Quick Oscommerce Fix + Add product Images

HI, I HAVE A PROBLEM UPLOADING A SEPERATE POPUP IMAGE WHEN ADDING A PRODUCT. ON THE ADD PRODUCT PAGE THEIR ARE TWO OPTIONS: - ADD THUMBNAIL IMAGE - ADD POPUP IMAGE THE ADD POPUP IMAGE IS NOT WORKING AND SO THE PRODUCT INFO PAGE STILL SHOWS THE THUMB IMAGE - I HAVE TWO IMAGES FOR EACH PRODUCT, 1 FOR PRODUCT LISTING AND THEN ANOTHER DIFFERENT ONE THAT THE USER SEES ON THE PRODUCT INFO PAGE AND CAN BE ENLARGED. ONCE THE ABOVE IS COMPLETE I NEED YOU TO GO THROUGH THE SITE ( 200 PRODUCTS) AND REPLACE THE THUMNAIL IMAGES AND ADD THE NEW POPUP IMAGES. ALL THESE IMAGES ARE AVAILABLE ON AN IDENTICAL SITE IN EXACTLY THE SAME ORDER SO IT'S VERY EASY TO DO. THIS IS A HEAVILY MODIFIED OSCOMMERCE SITE SO EXPERIENCE IS NECCESARY TO FIX THE POPUP IMAGE PROBLEM. PAYMENT STRICTLY VIA PAYPAL UPON COMPLETION. PLERASE TELL ME WHEN YOU CAN COMPLETE THIS - IT IS QUITE URGENT. THANKS