Depends what you would like to add and where the information is going.
One can easily add html formatting whatever to the form, then onsubmit send that info to another process.
All payment files that are unencoded are in /plugins/payments
all gateway files that are unencoded are in /www/admin/plugins/RevMax/lib
You will need to open the forms, scripts and read them, there is commented information in regards to functions within.
Hope that Helps,
Michael
