Web script to print checks on-line

Looking for someone to provide the backend data base and scripts to enable a visitor to print checks from a list of designs to their local printer. Also should have the ability to upload a .jpg for printing a customers own background. The script should be able to check the .jpg file for proper proportions and allow the customer to view the check before it will be processed. Check stock that will be used will be standard stock most anyone can purchase off a retail shelf for personal checks. Backend should have both an admin panel to maintain the site and a way to save information for customers that have visited before. End product could be a PDF generated from the customer supplied data and then downloaded to the customers desktop for easy printing. Payment collected from visiting customers that print their checks will be processed by credit card.