Or you can boot into recovery using ADB. "adb reboot recovery" is the command.
Alright boys and girls, as promised here is the status bar revert to all black for joels latest update. Its based off of his latest systemUI.apk, I just swapped the png's out. Tested by the man himself.
Drop this on your sd card and flash through recovery as usual.
Warning: This could cause your phone to blow up. Your phone, your choice.
Edit: Should also mention that if you have applied one of the other earlier flashables to remove the gps icon, flashing this will reverse that. Again, I will try to get up this mod later with the gps removed. This depends on what the wife wants to do today