By the way, is there a method of flashing back to SPRecovery without using RSD Lite and the SBF file or DroidRootHelper? Is there perhaps and update.zip or other method?
Edit: I found a way to do it with both the SPRecovery and Clockwork .img files. If you have a copy of either recoveries' .img file you can flash it from your SD card using the following command in Terminal Emulator.
flash_image recovery /sdcard/NameOfImageFileYouWantToFlash.img
Please note that there are space between "flash_image" & "recovery" and between "recovery" & "/sdcard/..."
Also make sure you have plenty of battery before flashing.