Document:

Exhibit 4.2

                  GUARANTY OF VALIDITY AND LIMITED PERFORMANCE

The  undersigned,  Steve  Solomon  ("Guarantor"),  is  financially interested in
Citadel  Security  Software  Inc.  ("Client"). In order to induce Allied Capital
Partners,  L.P.  ("Allied")  to  purchase  accounts  of  Client  pursuant to the
Factoring  Agreement  by  and  between  Allied  and  Client  (the  "Factoring
Agreement"),  Guarantor  hereby  personally  guarantees, warrants and represents
that  all  of its presently existing and hereinafter arising or created accounts
(as  that  term is defined by the UCC) (the "Accounts"): (i) are owned solely by
Client,  which  has  the  power  to  transfer  the Accounts and its title to the
Accounts  as  free  of  all  adverse  claims,  liens,  security  interests  and
restrictions  on  transfer,  encumbrance  or  pledge,  except  as created by the
Factoring  Agreement;  (ii)  set  forth  the correct and complete terms of sale,
which  have  not  been  and  will not be altered or amended; (iii) are valid and
owing, and all goods and services giving rise to the Accounts have been provided
or  delivered  to  the  extent  required  by Client's agreement with the Account
Debtor; (iv) will not be paid by a preference payment or fraudulent transfer (as
defined  by  the  Bankruptcy Code or the relevant law of any state); (v) are not
and  shall not become subject to a defense or claim in recoupment or setoff that
can  be asserted against Allied; (vi) are not owing by Account Debtors that were
subject  to insolvency or bankruptcy proceedings concerning which Client had any
notice  as  of  the  date the Account is or was sold, or in which Client owns an
interest  of  any  kind;  (vii)  if  purchased  by Allied, shall be reflected on
Client's  books  and  records  in  accordance with generally accepted accounting
principles  and  disclosures required by the Securities and Exchange Commission;
and  (viii)  if  purchased  by Allied, shall be evidenced by an invoice and each
such  invoice  shall  have  printed on the face thereof a statement, approved by
Allied, notifying the Account Debtor that the invoice has been sold and assigned
to  Allied  and  is payable only to Allied at its above-stated place of business
and that, if the Account is paid, the Account will be paid by the Account Debtor
in  accordance with such instructions. Guarantor also guarantees that the Client
will  at  all  times  treat each Account purchased by Allied under the Factoring
Agreement  and, all payments thereof, as the sole property of Allied and further
guarantees  the  Client's  faithful performance of its obligations arising under
paragraph  13  of  the Factoring Agreement entitled "Property of Allied/Proceeds
and  Returned  Goods  Held  in  Trust."  This  agreement  may  not be revoked by
Guarantor  without  the  written  consent  of  Allied.

Guarantor's  liability  hereunder  shall  not be affected by (a) any revocation,
release,  modification  or  settlement of all or any portion of the liability of
another  guarantor of Client's liabilities to Allied or of any Account purchased
by Allied or constituting collateral securing payment of Client's liabilities to
Allied, or (b) any modification or rearrangement of the liabilities of Client to
Allied,  effected  without  the  prior  knowledge  or  consent  of  Guarantor.

All  amounts payable hereunder are payable on demand of Allied at Dallas, Dallas
County,  Texas.  The  laws  of  the  State of Texas shall govern and control the
interpretation  and  enforcement  of  this  Guaranty.  In  the  event it becomes
necessary to file suit to collect any amounts due and owing hereunder, Allied my
recover its reasonable attorney's fees, cost of suit and interest on all amounts
owing  hereunder  at  a rate of 10% per annum it its judgment against Guarantor.
Guarantor waives notice of default, opportunity to cure, presentment and demand.

Executed on this 31st day of October, 2005

GUARANTOR:

Steve Solomon

By: /s/ Steven B. Solomon

Its: CEOExhibit 10.1

    
      

    

    Exhibit
      10.1

    

    
      	 	
              November
                2, 2005

            

    

    

    

    

    To
      the
      Stockholders of 

    Limelight
      Media Group, Inc. listed on Schedule
      1
      hereto

     

    

    Dear
      Stockholder:

    

    Pursuant
      our recent discussions, this Letter Agreement sets forth our understandings
      regarding your right to receive additional shares of our common stock, par
      value
      $.001 per share (the “Holdback
      Shares”),
      pursuant to the terms of the Agreement and Plan of Merger dated as of June
      30,
      2005 (the “Merger
      Agreement”)
      among
      our company, Limelight Merger II Corp., a Washington corporation, and Impart,
      Inc., a Washington corporation. Under the terms of the Merger Agreement, we
      are
      currently obligated to issue to you the number of Holdback Shares set forth
      opposite your name on Schedule
      1
      hereto.

    

    In
      lieu
      of our issuance to you of any Holdback Shares, you have agreed to accept, and
      we
      have agreed to issue to you, a promissory note substantially in the form of
      Exhibit
      A
      attached
      hereto (the “Promissory
      Note”)
      in the
      principal amount set forth opposite your name on Schedule
      1
      hereto,
      which amount is equal to the product of the number of Holdback Shares to which
      you are entitled multiplied by $.08. Upon your execution of this Letter
      Agreement and the subsequent issuance to you of your Promissory Note in lieu
      of
      your proportionate number of Holdback Shares, we will have no further
      obligations to you with respect to such Holdback Shares.

    

    This
      Letter Agreement shall be governed by, construed and enforced in accordance
      with, the laws of State of Delaware. In addition, this Letter Agreement and
      the
      exhibits hereto embody the entire agreement and understanding of the parties
      with respect to the subject matter hereof and supersedes all prior agreements
      and understandings between the parties.

    

    This
      Letter Agreement may be executed in any number of counterparts; all such
      counterparts shall be deemed to constitute one and the same instrument; and
      each
      of said counterparts shall be deemed an original hereof. Our obligations under
      this Letter Agreement shall be conditioned upon, and shall be subject to, our
      receipt of an executed counterpart signature page to this Letter Agreement
      from
      each of the stockholders listed on Schedule
      1.

    

      
        
          
          

        

        
          
          

          
            

          

        

        
          
          

        

      

To
      the
      Stockholders of

    Limelight
      Media Group, Inc.

    Listed
      on
      Schedule 1 hereto

    

    If
      you
      are in agreement with the foregoing and you wish to accept the terms of this
      Letter Agreement, kindly sign this Letter Agreement in the space provided and
      return an original signed copy of your counterpart to this Letter Agreement
      to
      the attention of Laird Laabs, President, Limelight Media Group, Inc., 1300
      North
      Northlake Way, Seattle, Washington 98103. Upon receipt of a countersigned Letter
      Agreement from all of the stockholders listed on Schedule
      1
      attached
      hereto, we will issue you a Promissory Note in the appropriate principal amount.
      

    

    
      	 	
              Very
                truly yours,

            
	 	 
	 	
              /s/Laird
                Laabs

            
	 	
              Laird
                Laabs

            
	 	
              President

            
	 	
              Limelight
                Media Group, Inc.

            

    

    

    

      
        	
                Acknowledged
                  and agreed to this 2nd day of November, 2005:

              	 
	 	 
	
                /s/
                  Steven Boscacci

              	 
	 	 
	
                /s/
                  Steven Corey 

              	 
	 	 
	
                /s/Nick
                  DeSante

              	 
	 	 
	
                /s/Larid
                  Laabs

              	 
	 	 
	
                /s/Joseph
                  Martinez

              	 
	 	 
	
                /s/Thomas
                  Muniz

              	 
	 	 
	
                /s/Edwin
                  Reger 

              	 
	 	 
	
                /s/Shane
                  Bumbalo

              	 
	 	 
	
                /s/Stretton
                  Brown

              	 
	 	 
	
                /s/Tom
                  O'Rourke

              	 

      

    

    

      
        
          
          

        

        
          
          

          
            

          

        

        
          
          

        

      

    

     

    Exhibit
      A

    

    Form
      of Promissory Note

    

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

    Schedule
      1

     

    
      
        
          	
                  Name

                	 	
                  No.
                    of Holdback Shares

                	 	
                  Principal
                    Amount of
                    Promissory Note ($)

                
	 	 	 	 	 
	
                  Steven
                    Boscacci

                	 	
                  2,847,887

                	 	
                  227,830.96

                
	
                  Steven
                    Corey

                	 	
                  17,547,939

                	 	
                  1,403,835.12

                
	
                  Nick
                    DeSante

                	 	
                  3,838,457

                	 	
                  307,076.56

                
	
                  Laird
                    Laabs

                	 	
                  17,547,939

                	 	
                  1,403,835.12

                
	
                  Joseph
                    Martinez

                	 	
                  3,282,904

                	 	
                  262,584.32

                
	
                  Thomas
                    Muniz

                	 	
                  5,765,114

                	 	
                  461,209.12

                
	
                  Edwin
                    Reger

                	 	
                  990,569

                	 	
                  79,245.52

                
	
                  Shane
                    Bumbalo

                	 	
                  1,355,412

                	 	
                  108,432.96

                
	
                  Stretton
                    Brown

                	 	
                  1,006,472

                	 	
                  80,517.76

                
	
                  Tom
                    O’Rourke

                	 	
                  3,317,308

                	 	
                  265,384.64

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