Write some Software

Hello, I've bought a software for selling online photos Ktools PhotoStore. You can see a demo here - [login to view URL] I want to modify the uploader that the software is using for uploading and editing the images as registered contributor. The current uploader only allows one upload at a time and you can upload only jpg,png and other files but not the eps file. I want when you upload example: 20 JPG+EPS to be generated with different sizes (software does that for jpgs now) but doesn't include in that one file the eps file it counts it as different one and you have to manually attach it later. If I upload one EPS+JPG outcome should be a generated file with JPG - Small, Medium, Large and Vector - EPS for download in one file. Similar websites that use that feature are microstock and examples here. [login to view URL] - Uploading JPG+EPS = 1 File with all sizes for download + Thumbnail for the file for preview in website [login to view URL] - Uploading only EPS file and it generates JPG, Small, Medium, Large and Vector for download + Thumbnail for the file for preview in website [login to view URL] - Uploading zip file that have JPG and EPS inside = generates JPG, Small, Medium, Large and Vector for download + Thumbnail for the file for preview in website The Ktools PhotoStore have this feature but its not as flexible and can't bulk upload only one. I just want modification to that feature. I hope someone understand me what I mean. Thank you!