CRE Loaded V6.2.1 Repairs and Mods for Two Stores

I have two older CRE Loaded stores that I need some modifications done on. They are exactly the same store they just have different mods done to them. The changes and modifications are easy mainly just switching things around and doing some security work. With this being said do not take this project unless you have extensive knowledge of OSCommerce and CRE Loaded and extensive PHP programming skills. Do not bid on this project if it's not something you can handle in a few days, I need this project done quickly. The two sites you will be working on are: [login to view URL] and [login to view URL] Below is a list of what I need accomplished: 1) Currently each site has a different checkout module installed, both are riddled with different problems and overall are very unreliable. I would like a simple one page checkout that will not give me problems for each store. I like the checkout module in [login to view URL] and would like to use this for both stores if it can be made to operate without problems. In short I want a bullet proof checkout module that will not give me errors and constantly breaking. 2) I want the admin area of [login to view URL] to have all the same features and addons of [login to view URL] 3) I need security work done on [login to view URL] to prevent hacks and other types of attacks. These stores have tons of modifications done to them, some were taken from ZenCart and OSCommerce. It is very important to test your work and make sure that one change does not effect another. Please ask me if you have any questions, I did most of the programming on these stores I just do not have the time right now to devote to this. Make sure you include your full understanding of this project with your bid.