Great, thanks for the info! How about for the stock ROM? I don't really want to loose everything now, then again when ICS is fully released.
I still had a stock ROM when I did it, but I didn't lose any data from it. Some people seem to lose data from their SD cards, but when I was done everything was as it should be. I made a backup of my SD card just in case, but ended up not needing it. I am not sure what causes some peoples SD cards to get erased, but not others though.