296473 modify existing php script

I have been working on a website which we combined two scripts together with one login, both were from the same original developer. However, the script now has some bugs and the developer seems too busy to stay focused on finishing the scripts small bugs. I need someone to help debug and fix the php bugs of the scripts. auction script url: [login to view URL] classfied script url: [login to view URL] If you notice, the registration url is the same on both headers and footers I need someone who really understands php and can make some modifications I need to add to this existing system, must fully integrate with the existing admin backend in place. I want to create a sales rep section for tracking their sales (notice the text box on the registration form S/R, this is to code the sales rep to the dealer who signed up). I want to track and tally their sales in the back-end as well as be able to adjust the commission they would receive on their sales. This is adjusted by the admin only. Each sales rep should be able to view and track their stats. The system should be set up to pay the sales rep via paypal when they sell a new account. The system should also be able to stop payment when a dealer does not renew the next month. Currently the dealers are billed via paypal's monthly subscription service. Currently there are some bugs in the system that first need fixing before doing the sales rep addon. I want you to find bugs in this system, by registering, posting, etc. and then fix the bugs. I want this site to be perfect. I will explain about the classifieds upload system vs. the auction uploading system, they are totally independent of each other and work differently. If dealers join, we have a system which can upload their entire database of inventory to the classifieds and it automatically deletes the existing ads. The auction system is different, it uploads their auction data, then they must individually finish each ad with pictures and features.