Root Major problem whilst trying to root!


When following the how to root acer liquid on Unlockr, I came across my phone not rebooting and sticking to a black screen, just after putting in superboot.
I know some other people have this problem with the newer OS or something. However, no one comes up with a solution for it..
Is there anything you can place on the SD card to boot from recovery (which is all my phone can now do) which can erase everything done in the Rooting process (revert to before putting on superboot)?