ASP COMERSUS Customizations

Greetings, I need 3 customizations done to the the Comersus Software... The customizations are below: 1. I need a Deposit input table on the [login to view URL] a. If THE customer puts in the Total of the Product, automatically marks the next invoice as Paid,, with a $0.00 BALANCE. and says paid on the Invoice screen. b. If the customer selects Pays a deposit, it will mark [login to view URL] with a Deposit Paid field and after it will show a Balance field below it, with that is due. 2. I want to be able to enter a product description and my own sku [login to view URL] [login to view URL] . So that way i dont have to select an existing product.. Then in the next screen invoice page [login to view URL] it will show the product descripption and sku that i previously entered. 3. OK. finally i need the system to email the customer, the invoice details via email in the body of the message. Just like [login to view URL] ++++ Please note, you can download a copy of Comersus ASP shopping Cart on [login to view URL]