**Exhibit 4.7**

**UNIT PURCHASE OPTION CLARIFICATIONAGREEMENT**

This Unit Purchase Option Clarification Agreement(this “Agreement”), dated September 20, 2006 is to amend the Unit PurchaseOption, dated as of August 15, 2005 (the “Option”), issued by Stone ArcadeAcquisition Corporation, a Delaware corporation, with offices at c/oStone-Kaplan Investments, LLC, One Northfield Plaza, Suite 480,Northfield, Illinois 60093 (“Company”), to Morgan Joseph &Co. Inc., with offices at 600 Fifth Avenue, 19th Floor, New York, New York 10020 (“OptionHolder”).

**WHEREAS,** as aresult of certain questions that have arisen regarding the accounting treatmentapplicable to the Option, the parties hereto deem it necessary and desirable toamend the Option to clarify that the Option Holder does not have the right, anddid not have the right at the time of issuance of the Option, to receive a netcash settlement in the event the Company does not maintain a current prospectusrelating to the units, common stock and warrants issuable upon exercise of theOption at the time such Option is exercisable.

**NOW, THEREFORE**, inconsideration of the mutual agreements contained herein and other good andvaluable consideration, the receipt and sufficiency of which are herebyacknowledged, and intending to be legally bound hereby, the parties heretoagree to amend the Option as set forth herein.

1.*             Option  *The undersigned hereby agree thatthe Option is hereby amended by adding the following as Section 2.1.1 tothe Option:

“2.1.1*      No Exercise of Purchase Option if aRegistration Statement is not Effective.*    Notwithstandinganything herein to the contrary, the Company shall not be obligated to deliverany securities pursuant to the exercise of this Purchase Option unless(i) a registration statement under the Act with respect to the Units,Warrants and Common Stock issuable upon such exercise is effective, or(ii) in the opinion of counsel to the Company or counsel to the Holderreasonably satisfactory to the Company, the exercise of this Purchase Option isexempt from the registration requirements of the Act and such securities arequalified for sale or exempt from qualification under applicable securitieslaws of the states or other jurisdictions in which the registered holdersreside. This Purchase Option may not be exercised by, or securities issued to,any registered holder in any state in which such exercise or issuance would beunlawful. The Holders are not, and at the time of the initial issuance of thisPurchase Option were not, entitled to receive a net-cash settlement or otherconsideration in lieu of physical settlement in securities if the securitiesunderlying this Purchase Option are not covered by an effective registrationstatement.”

2.*             Miscellaneous.*

                a.*             GoverningLaw; Jurisdiction.*    The validity,interpretation, and performance of this Agreement shall be governed in allrespects by the laws of the State of New York, without giving effect toconflict of laws. The Company hereby agrees that any action, proceeding orclaim against it arising out of or relating in any way to this Agreement shallbe brought and enforced in the courts of the State of New York or the UnitedStates District Court for the Southern District of New York, and irrevocablysubmits to such jurisdiction, which jurisdiction shall be exclusive. TheCompany hereby waives any objection to such exclusive jurisdiction and thatsuch courts represent an inconvenient forum. Any such process or summons to beserved upon the Company may be served by transmitting a copy thereof by registeredor certified mail, return receipt requested, postage prepaid, addressed to itin care of the address set forth above or such other address as the undersignedshall furnish in writing to the other. Such mailing shall be deemed personalservice and shall be legal and binding upon the Company in any action,proceeding or claim.

                b.*             BindingEffect.*    This Agreement shall be binding uponand inure to the benefit of the parties hereto and to their respective heirs,legal representatives, successors and assigns.

                c.*             EntireAgreement.*    This Agreement sets forth theentire agreement and understanding between the parties as to the subject matterthereof and merges and supersedes all prior

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discussions, agreements and understandings of any andevery nature among them. Except as set forth in this Agreement, provisions ofthe original Option which are not inconsistent with this Agreement shall remainin full force and effect. This Agreement may be executed in counterparts.

                d.*             Severability.*    ThisAgreement shall be deemed severable, and the invalidity or unenforceability ofany term or provision hereof shall not affect the validity or enforceability ofthis Agreement or of any other term or provision hereof. Furthermore, in lieuof any such invalid or unenforceable term or provision, the parties heretointend that there shall be added as a part of this Agreement a provision assimilar in terms to such invalid or unenforceable provision as may be possibleand be valid and enforceable

INWITNESS WHEREOF, the parties hereto have executed this Unit Purchase OptionClarification Agreement as of the date first written above. 
|        |   | STONE ARCADE ACQUISITION CORPORATION   |
|--------|--------|----------------------------------------|
|   |   |                                   |   |   |
|   |   |                                   |   |   |
|   |   | By:                                    |   | /s/  ROGER W. STONE |
|   |   |                                   |   | Name:  Roger W. Stone |
|   |   |                                   |   | Title:    Chairman and CEO |
|   |   |                                   |   |   |
|   |   |                                   |   |   |
|   |   | MORGAN JOSEPH & CO. INC. |
|   |   |                                   |   |   |
|   |   |                                   |   |   |
|   |   | By:                                    |   | /s/  MARY L. MALANOSKI |
|   |   |                                   |   | Name:  Mary L. Malanoski |
|   |   |                                   |   | Title:    Executive Vice  President |

 

 

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