I have been looking to mod the outgoing e-mails after registration and all I could find was core code hacks in the forums. this is never a good idea so I kept looking and I found Sankuru Email Editor and installed it with no issues and then found that it was not working as advertised. I contacted Erik and he and Yos checked in to it and found that the issue was not them but a Vtiger registration form extension that I had installed. So Yos updated a file that would work with the Vtiger extension. It works as I hoped it would!
Good work Sankuru Team!