CCBILL Postback Solution needed

What I need: ccbill provides a way to pass all approved order form variables except for the credit card information. I need a script that will capture the user info (user name, password, etc.) and pass these variables to a php based page that will automatically fill in these same fields to avoid the customer having to enter the same information two times in a row. Should be pretty basic for somebody who has worked will ccbill before. Thank you Jimmy