OK well that shoots the no-ram theory i the ass.
Enter your BIOS and disable APM (advanced power management)
disable PnP (plug and play)then type this at the boot prompt:

boot:failsafe <enter>
It won't try to detect all of your hardware and might just boot for you. If it boots then you can methodically eliminate the problem with cheat codes which can be found here:
http://www.knoppix.net/docs/index.php/CheatCodes

If that doesn't work then personally I would try this:

boot:knoppix lang=us noapic noagp noapm nodma vga=normal xserver=XF86_SVGA mem=128M <enter>

If it still won't work, get some info on your system, specifically: vertical & horizontal refresh rates, screen resolution, video card chip & amount of video ram. Then try this:

root:expert

Post back with results. -gluck