You don't HAVE to do it this way. I just did it to test some things. What ROM are you trying to flash?I rooted with metiCkone frg22d and see superuser icon. Do i just follow these instructions...Sorry for the rookie question,I just don't wont to kill my droid...
1. Flash to SPRecovery
2. Reboot into recovery
3. Wipe Data/Cache
4. Forgot to rename update.zip
5. Removed MicroSD and plugged into computer
6. Renamed update.zip
7. Reboot into recovery
8. Forgot to move out of folder and place straight to SD card
9. Removed MicroSD and moved update.zip onto SD card
10. Installed update.zip via SPRecovery
11. Reboot
12. Allow all market apps to update.
13. Install GE theme