Nice tutorial. You could also refer to this script which makes hacking a tad easier. Especially if you are planning to hack multiple frames.
http://forum.toribash.com/showthread.php?t=553652
Cool stuff. I was planning to do something like this in the near future, do tell if you need help.
Also what exactly is the advantage of using your own program over Notepad?
I don't mean to piss on your bonfire but Notepad++ can do everything your program can and more
should probably include another section concerning hacking replays with custom mods
will include more info on it tomorrow morning but just a suggestion
it does get a tad complicated