OSCommerce Fix

My oscommerce store has a few minor issues that need resolved.? Most of the hard work has been done, but it's still having a few problems.? I use three different distributors, and each of the three all post daily downloads of their data files.? I have scripts in php that go out daily and get this data, and add it to my inventory.? The problem is that there are so many products that it doesn't handle the request well.? I have another script that assigns an "image not available" logo to all products without images, other scripts that download the correct images and upload them to my server and link them up automatically, etc.? But the problems I'm experiencing I'd like fixed are: 1.? My oscthumb contribution quit working and it just shows dead links to images when I turn it on. 2.? I installed a featured products contribution that will show featured products on the main page and again for subcategories, but it doesn't work correctly. 3.? All of the products aren't being added to the store.? The script is timing out after it gets midway through certain categories, like in the knives catagory it gets through manufacturers A-C, and that's all it gets before timing out. I'd like for someone that's a true oscommerce expert to be able to wrap this up fairly quickly.? Not a "learn as you go" project.