Experiencing Blue Screen during Startup!

I have a dell 9100 and upgraded to Vista. Everything worked perfectly until
I tried to install Alcohol 120%. In the middle of the installation I got the
dreaded blue screen of death. Vista does not start in any of the safe mode
options and when I chose to start normally, Vista starts up but goes to the
blue screen within seconds because Vista was still trying to load the drivers
from Alcohol 120%. I still have some documents that I want to save. I tried
dropping in the Vista installation DVD but it doesn't register when I restart
the computer. How do I either remove the faulty Alcohol program and drivers,
or how do I repair Vista, or how do I get back to the factory partition of
windows xp that is located on my hard drive?