Can anyone make a script to edit the "Purchased By" field on iTunes? Thanks 
This is not possible.
This guy did it. But i don't know how to use a HEX Editor.
http://www.codez4mac.com/forum/viewtopic.p...198&t=72009
What are you getting at?
If you find a tool that complies with your needs then use it. And learn how to use it.
Tempering with the "purchased by" field would probably violate the copyrights. I understand that the developers of this program do not want to deliver the tool for illegal activities. Accept that.