knoppix should work, and there's no harm in trying anyway... The wireless network card might not bew supported, and you'd need to pull some tricks such as loading it off a floppy or hard drive installing knoppix and then setup the network card. I know the linux driver for that card exists, just don't know if knoppix has it...

It won't take advantage of the 64 bit CPU though. For that you should use gentoo/suse/debian/redhat/mandrake- any of those have versions that are specifically for AMD64.