Customized file upload script for IScipts Multicart 2.4 website using Uploadify

I need a custom image uploading script to modify my Iscripts Multicart 2.4 package that allows for multiple files to be selected and uploaded at the same time plus script installation. The image upload section for products will change as below a. Option for 'Small image' (while adding a product) will remove b. Option for 'Big image' (while adding a product) will remove. c. Seller will be able to upload all images in a single step. d. At least one image will be required to add a product. e. A maximum of 5 images will be possible to upload with each product f. Maximum file size of one file will be 700kb and preferred resolution will be 1024x768 g. The thumbnails and the small gallery image will be created automatically from the main images. h. Seller will be able to select one of these images as main image. Later he will be able to change this to any of the others. i. The current method for uploading multiple images will change and instead this will replace with the jquery upload provided by <<[login to view URL]>> <[login to view URL]>. Aspect ratio for the uploaded images must remain the same as originals.