40704 Fix PHP coding on OScomm. Site

I have a website based on OS Commerce. I have added a couple of add-ons such as Easy Populate and a Random Category Image generator. Easy Populate works perfectly, but once I added the Random Category Image generator and messed around with some settings - the images don't load on the site (most of them) and it takes fooooooorever to load like it's querying the MySQL database (or something?) too many times or the pictures aren't there and it keeps looking for them. I don't know - I'm lost as to what the problem is. I want somebody to look at the coding of the .php files and see where the errors are and fix them so ALL the pictures will load and the site will load fast and properly. I'm sure that someone who knows PHP and OSCommerce extremely well could fix this in a short amount of time.