Document:

<PAGE>

                                                                    Exhibit 4.07

                           THIRD AMENDMENT AND CONSENT
                           ---------------------------

          THIRD AMENDMENT AND CONSENT (this "Amendment"), dated as of June 22,
2001, among NEXTMEDIA GROUP, INC., a Delaware corporation ("Holdings"),
NEXTMEDIA OPERATING, INC., a Delaware corporation (the "Borrower"), the lenders
from time to time party to the Credit Agreement referred to below (the
"Lenders"), and Bankers Trust Company, as administrative agent (the
"Administrative Agent"). All capitalized terms used herein and not otherwise
defined herein shall have the respective meanings provided such terms in the
Credit Agreement referred to below.

                              W I T N E S S E T H:
                              - - - - - - - - - -

          WHEREAS, Holdings, the Borrower, the Administrative Agent and the
Lenders are parties to a Credit Agreement, dated as of July 31, 2000 (as
amended, modified or supplemented through, but not including, the date hereof,
the "Credit Agreement");

          WHEREAS, the Borrower intends to (i) issue at least $150,000,000 in
aggregate principal amount of Permitted Subordinated Notes (the "Note Issuance")
in conjunction with the acquisition of certain outdoor display assets of PNE
Media Corp. and certain outdoor advertising assets of Great Outdoor, Inc., Media
Displays, Inc. and Great Advertising, LLC (collectively, the "Acquisitions") and
(ii) use a portion of the proceeds of the Note Issuance to prepay all
outstanding Revolving Loans (the "Loan Prepayment", and together with the
Acquisitions and the Note Issuance, the "Third Amendment Transaction");

          WHEREAS, Holdings and the Borrower have informed the Lenders that
after giving effect to the consummation of the Third Amendment Transaction and
on a Pro Forma Basis, Holdings and the Borrower would not be in pro forma or,
     --- -----                                                  --- -----
prior to giving effect to this Amendment, projected compliance with Section 9.08
of the Credit Agreement for the Calculation Period ended on March 31, 2001 or
for the one year period after the consummation of the Transaction as otherwise
required to be demonstrated pursuant to Sections 8.14 and 9.04(ix) of the Credit
Agreement (the "Pro Forma Interest Coverage Covenant Waiver"); and
                --- -----

          WHEREAS, Holdings and the Borrower have requested, and the Lenders
have agreed, (i) to grant the Pro Forma Interest Coverage Covenant Waiver to
                              --- -----
permit the Third Amendment Transaction and (ii) to amend Section 9.08 of the
Credit Agreement and certain other provisions of the Credit Agreement, in each
case as provided herein;

          NOW, THEREFORE, it is agreed:

          1. Notwithstanding anything to the contrary contained in Section 8.14
or 9.04(ix) of the Credit Agreement, the Lenders hereby grant the Pro Forma
Interest Coverage Covenant Waiver to permit the consummation of the Third
Amendment Transaction, provided that (i) all other conditions to the
consummation of the Third Amendment Transaction have been met as required by the
Credit Agreement and (ii) after giving effect to this Amendment, Holdings and
the Borrower will be in projected compliance with Section 9.08 of the Credit
Agreement for the one year period following the consummation of the Transaction.
<PAGE>

          2. Section 3.03(d) of the Credit Agreement is hereby amended by (x)
deleting the text "540 days" appearing in clause (ii) of the first proviso
thereof and in clause (B) of the further proviso thereof and in inserting in
each such place the text "360 days" in lieu thereof and (y) deleting the text
"540-day period" appearing in clause (B) of the further proviso thereof and
inserting the text "360-day period" in lieu thereof.

          3. Section 3.03(e) of the Credit Agreement is hereby amended by
deleting the text "365 days" each place such text appears therein and inserting
the text "360 days" in each such place in lieu thereof.

          4. Section 9.03(iii) of the Credit Agreement is hereby amended by
inserting the following text at the end of such Section and immediately before
the semi-colon appearing at the end thereof:

          ", although no more than $2,500,000 of such Dividends and
          repurchases in the aggregate may be made pursuant to this
          clause (iii) unless same is otherwise permitted at such time
          pursuant to the terms of any Permitted Subordinated Note
          Documents".

          5. Section 9.07(a)(ii) of the Credit Agreement is hereby amended by
deleting the text "5%" appearing therein and inserting the text "an amount equal
to the sum of $5,000,000 plus 2%" in lieu thereof.

          6. The table appearing in Section 9.08 of the Credit Agreement is
hereby deleted and the following new table is inserted in lieu thereof as well
as the following new sentence at the end of such Section 9.08:

"Fiscal Quarter Ending                Ratio
----------------------                -----

September 30, 2000                   1.50:1.00
December 31, 2000                    1.65:1.00
March 31, 2001                        1.75:100
June 30, 2001                        1.50:1.00
September 30, 2001                   1.40:1.00
December 31, 2001                    1.40:1.00
March 31, 2002                       1.40:1.00
June 30, 2002                        1.40:1.00
September 30, 2002                   1.75:1.00
December 31, 2002                    1.75:1.00
March 31, 2003                       2.00:1.00
June 30, 2003                        2.25:1.00
September 30, 2003                   2.50:1.00
December 31, 2003                    2.50:1.00
March 31, 2004                       2.75:1.00
June 30, 2004                        2.75:1.00
September 30, 2004                   3.00:1.00
December 31, 2004                    3.00:1.00

                                      -2-
<PAGE>

March 31, 2005 and the last
day of each fiscal quarter of
Holdings thereafter                  3.50:1.00.

          Notwithstanding the foregoing, (i) from and after the Third Amendment
Effective Date through but not including the initial incurrence of any Loans
after the Third Amendment Effective Date, the ratios set forth in the table
above in this Section 9.08 shall not be applicable and Holdings and the Borrower
need not be in compliance with such ratios, (ii) at the time of the initial
incurrence of any Loans after the Third Amendment Effective Date, (x) Holdings
and the Borrower shall, on a Pro Forma Basis, have a Consolidated Cash Interest
                             --- -----
Coverage Ratio for the Test Period then most recently ended of at least that
ratio that would have been required to have been complied with had the
provisions of preceding clause (i) not been effective and (y) Holdings shall
deliver to the Administrative Agent a certificate of an Authorized Officer of
Holdings containing the calculations (in reasonable detail) required to
demonstrate compliance with preceding sub-clause (x), and (iii) from and after
the initial incurrence of any Loans after the Third Amendment Effective Date,
Holdings and the Borrower once again shall be required to comply with the
applicable ratios set forth in the table above in this Section 9.08."

          7. The table appearing in Section 9.09(b) of the Credit Agreement is
hereby deleted and the following new table is inserted in lieu thereof:

                       "Period                                   Ratio
                        ------                                   -----

June 30, 2001 through and including June 29, 2002              7.00:1.00

June 30, 2002 through and including September 29, 2002         6.75:1.00

September 30, 2002 through and including December 30, 2002     6.50:1.00

December 31, 2002 through and including March 30, 2003         6.25:1.00

March 31, 2003 through and including June 29, 2003             6.00:1.00

June 30, 2003 through and including September 29, 2003         5.75:1.00

September 30, 2003 through and including March 30, 2004        5.50:1.00

March 31, 2004 through and including June 29, 2004             5.25:1.00

                                      -3-
<PAGE>

               "Period                                           Ratio
                ------                                           -----
June 30, 2004 and thereafter                                   5.00:1.00

          Notwithstanding the foregoing, (i) from and after the Third Amendment
Effective Date through but not including the initial incurrence of any Loans
after the Third Amendment Effective Date, the ratios set forth in the table
above in this Section 9.09(b) shall not be applicable and Holdings and the
Borrower need not be in compliance with such ratios in each case, so long as
from and after January 1, 2002 and prior to the initial incurrence of any Loans
after the Third Amendment Effective Date, the Total Leverage Ratio shall be no
greater than 7.50:1.00, (ii) at the time of the initial incurrence of any Loans
after the Third Amendment Effective Date, (x) Holdings and the Borrower shall,
on a Pro Forma Basis, have a Total Leverage Ratio at such time no greater than
     --- -----
that ratio that would have been required to have been complied with at such time
had the provisions of preceding clause (i) not been effective and (y) Holdings
shall deliver to the Administrative Agent a certificate of an Authorized Officer
of Holdings containing the calculations (in reasonable detail) required to
demonstrate compliance with preceding sub-clause (x), and (iii) from and after
the initial incurrence of any Loans after the Third Amendment Effective Date
(even if such initial incurrence occurs prior to January 1, 2002), Holdings and
the Borrower once again shall be required to comply with the applicable ratios
set forth in the table above in this Section 9.09(b)."

          8. Section 9.10 of the Credit Agreement is hereby amended by deleting
the text "4.00:1.00" appearing therein and inserting the text "3.50:1.00" in
lieu thereof.

          9. The definition of "Cash Equivalents" appearing in Section 11.01 of
the Credit Agreement is hereby amended by deleting the text "one year" appearing
in clauses (i), (ii), (iii) and (v) thereof and inserting the text "360 days" in
lieu thereof in each such place."

          10. Section 11.01 of the Credit Agreement is hereby amended by
deleting the definitions of "Consolidated EBITDA", "Consolidated Indebtedness"
and "Pro Forma Basis" appearing therein and inserting the following new
     --- -----
definitions of "Consolidated EBITDA", "Consolidated Indebtedness and "Pro Forma
                                                                      --- -----
Basis" in lieu thereof:

          "Consolidated EBITDA" shall mean, for any period, Consolidated EBIT
     for such period, adjusted by adding thereto (i) the amount of all
     amortization of intangibles (including, but not limited to, goodwill) and
     depreciation that were deducted in arriving at Consolidated Net Income for
     such period, (ii) the amount of all non-cash compensation payable in equity
     of Holdings (or its parent company) for such period to the extent that same
     was deducted in arriving at Consolidated Net Income for such period, and
     (iii) the amount of all expenses incurred in connection with the
     Transaction and the Third Amendment Transaction for such period to the
     extent that same were deducted in arriving at Consolidated Net Income for
     such period; it being understood that in determining the Total Leverage
     Ratio and the Senior Leverage Ratio only, Consolidated EBITDA for any
     period shall be calculated on a Pro Forma Basis to give effect to any Asset
                                     --- -----
     Sale, any Acquired Entity or Business acquired during such period pursuant
     to a Permitted Acquisition and not

                                      -4-
<PAGE>

     subsequently sold or otherwise disposed of by Holdings or any of its
     Subsidiaries during such period and any New Billboard Purchase effected
     during such period to the extent that the new billboard business subject
     thereto was not subsequently sold or otherwise disposed of by Holdings or
     any of its Subsidiaries during such period. Notwithstanding the foregoing,
     in no event shall Consolidated EBITDA be adjusted in any period on a Pro
                                                                          ---
     Forma Basis for New Billboard Purchases in an amount which would exceed
     -----
     $2,000,000.

          "Consolidated Indebtedness" shall mean, at any time, the sum of
     (without duplication) (I) all Indebtedness for borrowed money of Holdings
     and its Subsidiaries and the principal component of all Capitalized Lease
     Obligations of Holdings and its Subsidiaries determined on a consolidated
     basis in accordance with generally accepted accounting principles at such
     time and (II) all Contingent Obligations of Holdings and its Subsidiaries
     at such time in respect of Indebtedness of any third Person of the type
     referred to in preceding clause (I) of this definition; provided that, for
     purposes of Sections 9.09 and 9.10 only (and not for any other purpose),
     Consolidated Indebtedness at any time shall be calculated net of the amount
     of all unrestricted cash and Cash Equivalents of Holdings and its
     Subsidiaries at such time as would appear on a consolidated balance sheet
     of Holdings in accordance with generally accepted accounting principles but
     only in the amount thereof that is in excess of the aggregate principal
     amount of all Revolving Loans and Swingline Loans outstanding at such time
     (it being understood that, in any event, all cash and Cash Equivalents
     subject to escrow or similar arrangements shall not be considered
     unrestricted for purposes of this definition).

          "Pro Forma Basis" shall mean, in connection with any calculation of
           --- -----
     compliance with any financial covenant or financial term, the calculation
     thereof after giving effect on a pro forma basis to (x) the assumption,
                                      --- -----
     issuance or incurrence of any Indebtedness (other than revolving
     Indebtedness, except to the extent same is incurred to refinance other
     outstanding Indebtedness or to finance a Permitted Acquisition or a New
     Billboard Purchase) after the first day of the relevant Calculation Period
     as if such Indebtedness had been incurred (and the proceeds thereof
     applied) on the first day of the relevant Calculation Period, (y) the
     permanent repayment of any Indebtedness (other than revolving Indebtedness,
     except to the extent accompanied by a permanent commitment reduction) after
     the first day of the relevant Calculation Period as if such Indebtedness
     had been retired or redeemed on the first day of the relevant Calculation
     Period or (z) the Asset Sale, the Permitted Acquisition or the New
     Billboard Purchase, if any, then being consummated as well as any other
     Asset Sale, Permitted Acquisition or New Billboard Purchase consummated
     after the first day of the relevant Calculation Period and on or prior to
     the date of the respective Asset Sale, Permitted Acquisition or New
     Billboard Purchase then being effected, as the case may be, with the
     following rules to apply in connection therewith:

               (i) all Indebtedness (x) (other than revolving Indebtedness,
          except to the extent same is incurred to refinance other outstanding
          Indebtedness or to finance a Permitted Acquisition or a New Billboard
          Purchase) incurred or issued after the first day of the relevant
          Calculation Period (whether incurred to finance a Permitted
          Acquisition, a New Billboard Purchase, to refinance Indebtedness or
          otherwise) shall be deemed to have been incurred or issued (and the
          proceeds

                                      -5-
<PAGE>

          thereof applied) on the first day of the respective Calculation Period
          and remain outstanding through the date of determination and (y)
          (other than revolving Indebtedness, except to the extent accompanied
          by a permanent commitment reduction) permanently retired or redeemed
          after the first day of the relevant Calculation Period shall be deemed
          to have been retired or redeemed on the first day of the respective
          Calculation Period and remain retired through the date of
          determination;

               (ii) all Indebtedness assumed to be outstanding pursuant to
          preceding clause (i) shall be deemed to have borne interest at (x) the
          rate applicable thereto, in the case of fixed rate indebtedness or (y)
          the rates which would have been applicable thereto during the
          respective period when same was deemed outstanding, in the case of
          floating rate Indebtedness (although interest expense with respect to
          any Indebtedness for periods while same was actually outstanding
          during the respective period shall be calculated using the actual
          rates applicable thereto while same was actually outstanding);

               (iii) in making any determination of Consolidated EBITDA, pro
                                                                         ---
          forma effect shall be given to any Asset Sale, Permitted Acquisition
          -----
          or New Billboard Purchase consummated during the periods described
          above, with such Consolidated EBITDA to be determined as if such Asset
          Sale, Permitted Acquisition or New Billboard Purchase was consummated
          on the first day of the relevant Calculation Period, and, in the case
          of a Permitted Acquisition only, taking into account factually
          supportable and identifiable cost savings and expenses reasonably
          approved by the Administrative Agent, as if such cost savings or
          expenses were realized on the first day of the respective Calculation
          Period; and

               (iv) notwithstanding the foregoing, New Billboard Purchases may
          not be given pro forma effect as otherwise provided above unless the
                       --- -----
          Borrower has demonstrated to the Administrative Agent's reasonable
          satisfaction that the acquired billboard or billboards subject to such
          New Billboard Purchase has at least three months of reliable operating
          history.

          11. Section 11.01 of the Credit Agreement is hereby further amended by
inserting the following new definitions of "New Billboard Purchase", "Third
Amendment Effective Date" and "Third Amendment Transaction" in the appropriate
alphabetical order:

                                      -6-
<PAGE>

          "New Billboard Purchase" shall mean the purchase by the Borrower or
     any of its Subsidiaries of a new billboard or billboards from a third
     Person that is not Holdings or any other Subsidiary of Holdings which has
     less than one year of historical operating history; it being understood
     that a New Billboard Purchase may consist of those billboards which are a
     part of a Permitted Acquisition and which have less than one year of
     historical operating history.

          "Third Amendment Effective Date" shall have the meaning provided in
     the Third Amendment, dated as of June 22, 2001, to this Agreement.

          "Third Amendment Transaction" shall have the meaning provided in the
     recitals to the Third Amendment, dated as of June 22, 2001, to this
     Agreement.

          12. Notwithstanding anything to the contrary contained in the Credit
Agreement, to the extent that the aggregate principal amount of Permitted
Subordinated Notes issued as part of the Note Issuance exceeds $170,000,000
(such excess, the "Excess Issuance Amount"), the Total Revolving Loan Commitment
shall be permanently reduced on the date of the Note Issuance in an amount equal
to such Excess Issuance Amount; provided that the aggregate amount of such
reduction pursuant to this Section 12 shall not exceed $25,000,000. The
reduction to the Total Revolving Loan Commitment pursuant to this Section 12
shall be applied to permanently and proportionately reduce the Revolving Loan
Commitment of each Lender.

          13. Each of Holdings and the Borrower hereby represents and warrants
that after giving effect to this Amendment (x) no Default or Event of Default
exists on the Third Amendment Effective Date (as defined below) and (y) all of
the representations and warranties contained in the Credit Agreement and in the
other Credit Documents shall be true and correct in all material respects on the
Third Amendment Effective Date with the same effect as though such
representations and warranties had been made on and as of such date (it being
understood that any representation or warranty made as of a specific date shall
be true and correct in all material respects as of such specific date).

          14. This Amendment is limited as specified and shall not constitute a
modification, acceptance or waiver of any other provision of the Credit
Agreement or any other Credit Document.

          15. This Amendment may be executed in any number of counterparts and
by the different parties hereto on separate counterparts, each of which
counterparts when executed and delivered shall be an original, but all of which
shall together constitute one and the same instrument. A complete set of
counterparts shall be lodged with the Borrower and the Administrative Agent.

          16. THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES
HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAW OF THE
STATE OF NEW YORK.

          17. This Amendment shall become effective as of the date first set
forth above (the "Third Amendment Effective Date") when (i) each of Holdings,
the Borrower and the

                                      -7-
<PAGE>

Required Lenders shall have signed a counterpart hereof (whether the same or
different counterparts) and, in each case, shall have delivered (including by
way of telecopier) the same to the Administrative Agent at the Notice Office and
(ii) the Third Amendment Transaction shall have been consummated.

                                      * * *

                                      -8-
<PAGE>

          IN WITNESS WHEREOF, each of the parties hereto has caused a
counterpart of this Amendment to be duly executed and delivered as of the date
first above written.

                                        NEXTMEDIA GROUP, INC.

                                        By _____________________________________
                                           Name:
                                           Title:

                                        NEXTMEDIA OPERATING, INC.

                                        By _____________________________________
                                           Name:
                                           Title:

                                        BANKERS TRUST COMPANY

                                        By _____________________________________
                                           Name:
                                           Title:

                                        LEHMAN COMMERCIAL PAPER INC.

                                        By _____________________________________
                                           Name:
                                           Title:
<PAGE>

                                        CREDIT SUISSE FIRST BOSTON

                                        By _____________________________________
                                           Name:
                                           Title:

                                        CITICORP USA, INC.

                                        By _____________________________________
                                           Name:
                                           Title:

                                        UNION BANK OF CALIFORNIA, N.A.

                                        By _____________________________________
                                           Name:
                                           Title:<PAGE>

                                                                    Exhibit 4.08

                                FOURTH AMENDMENT
                                ----------------

          FOURTH AMENDMENT (this "Amendment"), dated as of December 20, 2001,
among NEXTMEDIA GROUP, INC., a Delaware corporation ("Holdings"), NEXTMEDIA
OPERATING, INC., a Delaware corporation (the "Borrower"), the lenders from time
to time party to the Credit Agreement referred to below (the "Lenders"), and
Bankers Trust Company, as administrative agent (the "Administrative Agent"). All
capitalized terms used herein and not otherwise defined herein shall have the
respective meanings provided such terms in the Credit Agreement referred to
below.

                              W I T N E S S E T H:
                              - - - - - - - - - -

          WHEREAS, Holdings, the Borrower, the Administrative Agent and the
Lenders are parties to a Credit Agreement, dated as of July 31, 2000 (as
amended, modified or supplemented through, but not including, the date hereof,
the "Credit Agreement"); and

          WHEREAS, the parties to the Credit Agreement wish to amend the Credit
Agreement as herein provided.

          NOW, THEREFORE, it is agreed:

          1. Section 8.14 of the Credit Agreement is hereby amended by inserting
the following new text at the end thereof:

          "Notwithstanding anything to the contrary contained in sub-clause (ii)
          of this Section 8.14, the Borrower shall only be required to provide
          to the Administrative Agent 3 Business Days' prior written notice with
          respect to any Permitted Acquisition if no Loans are outstanding at
          the time of (and immediately after giving effect to) such Permitted
          Acquisition (although the Borrower shall otherwise comply with the
          other clauses of this Section 8.14 in respect of any such Permitted
          Acquisition)."

          2. The final paragraph in Section 9.09(b) of the Credit Agreement is
hereby amended by deleting the text "January 1, 2002" each place such text
appears therein and inserting the text "July 1, 2002" in lieu thereof in each
such place.

          3. Each of Holdings and the Borrower hereby represents and warrants
that, both before and after giving effect to this Amendment, (x) no Default or
Event of Default exists on the Fourth Amendment Effective Date (as defined
below) and (y) all of the representations and warranties contained in the Credit
Agreement and in the other Credit Documents shall be true and correct in all
material respects on the Fourth Amendment Effective Date with the same effect as
though such representations and warranties had been made on and as of such date
(it being understood that any representation or warranty made as of a specific
date shall be true and correct in all material respects as of such specific
date).
<PAGE>

          4. This Amendment is limited as specified and shall not constitute a
modification, acceptance or waiver of any other provision of the Credit
Agreement or any other Credit Document.

          5. This Amendment may be executed in any number of counterparts and by
the different parties hereto on separate counterparts, each of which
counterparts when executed and delivered shall be an original, but all of which
shall together constitute one and the same instrument. A complete set of
counterparts shall be lodged with the Borrower and the Administrative Agent.

          6. THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES
HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAW OF THE
STATE OF NEW YORK.

          7. This Amendment shall become effective as of the date first set
forth above (the "Fourth Amendment Effective Date") when each of Holdings, the
Borrower and the Required Lenders shall have signed a counterpart hereof
(whether the same or different counterparts) and, in each case, shall have
delivered (including by way of telecopier) the same to the Administrative Agent
at the Notice Office.

                                      * * *

                                      -2-
<PAGE>

          IN WITNESS WHEREOF, each of the parties hereto has caused a
counterpart of this Amendment to be duly executed and delivered as of the date
first above written.

                                        NEXTMEDIA GROUP, INC.

                                        By______________________________________
                                          Name:
                                          Title:

                                        NEXTMEDIA OPERATING, INC.

                                        By______________________________________
                                          Name:
                                          Title:

                                        BANKERS TRUST COMPANY

                                        By______________________________________
                                          Name:
                                          Title:

                                        LEHMAN COMMERCIAL PAPER INC.

                                        By:_____________________________________
                                           Name:
                                           Title:
<PAGE>

                                        CREDIT SUISSE FIRST BOSTON

                                        By:_____________________________________
                                           Name:
                                           Title:

                                        CITICORP USA, INC.

                                        By:_____________________________________
                                           Name:
                                           Title:

                                        UNION BANK OF CALIFORNIA, N.A.

                                        By:_____________________________________
                                           Name:
                                           Title:

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