Hitting F8 Should definitely work I think! If for some reason it doesn't (and I can't think of why) You can create a knoppix live boot disk. I'm not sure what kind of time frame you are on, but if you did that (you can download it very quickly) and used something like deep burner to burn it into a bootable cd-rom you could get into your hard drive and censor any remaining incriminating evidence before you fetch your techie for help.
Hope that helps,
Cheers.