Everything seems to work OK, but don't count on it. Like I said, this was done because I can and for a laugh. Backup with CWM before you try and be sure to have a copy of CWM to hand if you want to go back.
You NEED S-OFF to use this (Alpharev HBOOT) as it's flashed using fastboot. So, enjoy!
1. Turn your phone off
2. Turn it on with the back button held down
3. Plug your phone into your PC
4. flash using fastboot
fasboot flash recovery Amon_Ra-126.96.36.199.img
Amon_Ra is actually pretty cool, there's a lot of stuff you can do via ADB (plug the phone in, type adb shell [enter] then utility [enter]). Main problem: the zips you flash NEED to be signed for Amon_Ra to flash them.