New
#11
yeah, it's a pain that the USB boot option is too modern for the mobo :/
I had similar problems with a 2003 Compaq work machine as just a CD drive and no USb support. I gave up on that machine, as my installation disc was too scratched to work when I swapped optical drives and couldn't be asked to upgrade to SP2. hardly the best exemplary motivator though
Do try swapping the optical drives if you have the time, and check the disc is completely unscratched (but the error you got doesn't look like a problem with the disc)