Ubuntu isn't the only distro available, it's the most popular among beginners.
You'll need to shrink your partition with the knoppix cd to make room for an install.
Try downloading and burning a Fedora live CD and a Debian net install cd.
The fedora will be easy to install.
Debian is one I have covered on another post here.
SuSE is another that may work for your box.
64bit is a live dvd and a net install.
I have an HP DV6449us Notebook PC with Windows Vista Home Premium, AMD processor, 2gb RAM, NVidia Graphics. I own Windows XP Professional, which I can successfully install next to Vista for a great dual-boot setup. I also own Windows Vista Business. I'm curious as to whether or not I can triple-boot?
And computer seems to have a problem with Linux. Of course, as you might've guessed, I want to add Linux to the multi-boot setup as well. The Knoppix live cd runs flawlessly, but the Ubuntu both x86 and 64bit editions do not load. I cannot seem to get a running GUI. Linux starts loading, and then goes to a black screen and stops. No live cd or direct install for Ubuntu or Linux Mint. Pooey.
Any help would be greatly appreciated! Thanks!