Design your own napkin script, PHP/Javascript or Flash

Hello. We require a script that allows users to design their own napkins, very similar to this design: [login to view URL] However more efficient and streamlined... We do not require the design just the back end programming. We need to me able to modify the script, as more products will be added at a later date, such as bags, and books. We would require a few custom modifications such as: around about 8 colours to start with but I'd have to be able to add to the colours later on, Also I would need a custom colour button with a listing of custom colours and it would add $8 onto the price at the end shopping cart. Then I would have to have an option of what colour of print they want... of about 8 options, But I'd have to be able to add to it later on... The text would be a set size and not be able to be changed, and with positions I would have to have set positions that they can choose from a list. Also I only want a selected amount of fonts at the beginning, however would be able to add more fonts in time. On the checkout I would like a function for returning customers where it fills in all their details and also an option for a gift box, which adds a bit extra to the price. Ideally the script would be built in php and javascript, or flash for some more examples on similar products please go to the following sites: [login to view URL] [login to view URL] For more links of exactly what we are looking for please PM us. Please view the uploaded file for full details. Please only contact us after you have read the attached file. Thank you Cheaper bids are welcomed if possible :)