Hi PMajor,
This is pretty simple to do in code. You just get the location of the solution. Send us a donation for $25 (Qdabra.com -> Products -> Support) and we'll spend the 30 minutes to dig out the code and send you a sample. I'm assuming you are ok with .NET but if not, just say so. Javascript doesn't work for browser forms. By the way, code requires admin deploy if you have browser forms. SP2010 removes this restriction though.
Happy trails!