I need ASAP a deposit hack for product attributes, that ties in with the existing database.
The customer is presented with a custom order form (made up from attributes) oneof these is a choice of deposit, either 25% 50% or 100% it has to be able to work with any chosen payment module, and leave a record in the database as what was paid and what is remaining to pay visible to the admin and the customer.
I do not mind if the hack is an attribute or extra code so long as it works from the [login to view URL] page please.