Question about 'print_stop_message'

[Antivirus]

I am submitting info through a form in AdminCP. If the script fails my error check, I use 'print_stop_message' to display an error message and then redirect back to the original script.

Problem is the information previously entered in the form is no longer there. How can I get the form to remember what was previously entered so Admin doesn't have to enter it again?

I know it's possible as most forms in vbulletin's admincp have this feature, i just can't figure out how it's done. I was thinking of puting all the field values into a session array, but there's got to be an easier way.

Anyone know?