[tokuzumi]

You need to make sure you have super user (SU) access on your phone. When I ran the auto-rooter in the Flipz Kitchen, when the phone rebooted, I was put into the RA menu, with the options to wipe my phone, create partitions on the SD card, make/restore from nandroid backup, load rom from SD card, etc.

Make sure before you wipe before flashing a new ROM (sounds like you didn't do that, and that's why you saw the red "!")!!! I didn't do this, and my phone was stuck at the first HTC screen for a half hour. That was my only issue. But once I resolved that issue, I was good to go.