This has been moved to...
http://www.my-eldorado.net/GGChecksumRecovery_win32.zip

The also posted the great PHP script you guys put together, though sadly declined to include you, the authors names...
/*
This code is released unto the public domain
*/

While I'm posting, I just wanted to say:
1) Great to see 3 of you working together to produce all this code.
2) That I respect and admire you all, for this great work.
3) Reading your collaborative efforts has made me decide to learn programming. I realise I want to "play".

You guys all rock and it has been great reading this long thread.
Well Done.

- David (Australia)