How To-Add a Menu to details.asp

Software: SaleCart Pro 4 (Dreamweaver), Dynamic Site

Challenge: On my ship to Page (details.asp), I would like to
add another field to be processed into the order as a:

1) Drop Down Menu

I've added the Menu to details.asp in Dreamweaver MX and
have uploaded to Host.

Problem:
The menu shows up on details.asp but, upon
confirming order, confirm.asp does not display the new
value of the drop down menu.

I just need a step by step on what I need to input value wise
in details.asp and any mods to make in the store.

-cberish