Decoding A Script

Hi We are looking for an experienced PHP/HTML Programmer to decode a penny auction script we have from pennyauctionsoft, this job is to remove all callbacks known hacker files and other security issues within this script. Once done it needs to be fully tested and working without any problems at all this will inclue things like the timmers working correctly and other known bugs within the script, once completed you will have to show us that its working fine without any problems at all. The script can be downloaded for the winning bidder to view. Thanks