Doom3 has a native installer for linux located on disc 3. Shame its buried so deeply within the disc. I wouldnt say Linux 0wnz0rs Windows, they both have their pros and cons, but Linux is getting better faster. How many times ive gone to Command prompt in windows cos im too lazy to click 1x1251243635656 million times to get into a file!
I has a problem with a Knoppix 3.3. When I put it in the drive (this is the version that runs strictly off the cd), I'd restart the comp, but it would go for the windows start-up...It only went to Knoppix once. How do I get it to work?!?!
Sounds to me like your bios is misconfigured to boot off the wrong media. Go into your bios and change the boot sequence making sure that particular cd/dvd player that runs knoppix is on your boot sequence before anything that holds windows.
Barring that, there might be a problem with your cd/dvd in which case Ive always found it easiest to just burn a new one.