The answers to any questions you could possibly ask can be found in the Upgrades section found here:
http://forum.ppcgeeks.com/forumdisplay.php?f=53
It is a work in progress (WM6). I have used it for a couple of months and absolutly love it. It gave my phone new life. Look at the stickied links in the upgrades section and feel free to ask any questions. No need to continue the discussion in this thread. Just hop on into the fire at the link above and enjoy having a new operating system. As stated do at your own risk, but as you will see there are very few if any people that say they broke their phone. Very easy to learn to upgrade, but you must read and search and read some more. Good Luck.