If you already tried to use the 2.1 SBF this will not help you.
RSDLite 4.8 ---->
System SBF ---->
If you are not familiar on how to use RSDLite here is a brief overview
Switch your device to PC mode
Turn on debugging mode (settings>applications>development>debugging mode)
Launch RSDLite (make sure device appears in window)
Device will switch to bootloader and begin the flashing process and will reboot when it is complete.
WHAT YOU NEED TO KNOW ******
This is not a full sbf file, it will not cure the worlds ailments. It will recovery your system to the stock 2.3.13 odexed state. If you mess up something other than the system partition this will not fix your problem. But if your only trying to theme or delete blur this will work if something goes wrong.
Edited by p3droid, 22 September 2010 - 11:37 PM.