Run app, select appropriate version, hit root. Wait ~30 sec, see root confirmation. You are now rooted!!!!
Need a super easy way to get recovery image installed? Download ROM Manager (free) and install the ClockworkMod Recovery. You can now install roms with either ROM manager or thru recovery. You can even flash alternate recovery (RA 1.6.2) from rom manager.
This is stupid easy!!!!
I just did these exact steps about 10 min ago and it worked flawlessly. No messing with RUUs.
Not sure if boot-patched.zip should be flashed afterwards like in the original 2.1 root. Someone else please chime in on this.
NEW VERSION ADDED