[Mattyovers]

Mmm, I'm the save editor guy, and I've already released it, years ago... And it pretty much does everything you mentioned... :P
It's here:
http://www.zophar.net/utilities/tran...ve-editor.html

Oh right, I didn't notice, well I shall still release mine anyway because there is no point in letting all that research and code go to waste is there