Wireless support depends on what chip set your HP uses. There is a good chance that Linux will support your HP. Try the BackTrack2 Live CD if you want a Live CD with a good chance of supporting your hardware. Mandriva and Puppy Linux may also have the support you need. But Knoppix wireless support is particularly poor and installing Knoppix on a hard disk is usually a mistake unless you are a very experienced user. I would suggest that you find some distro that is intended for hard disk install if that's what you are trying to do.