Weird that it works Live but not when installing. Not unheard of, but certainly frustrating.
I know what you mean about wireless. A friend had Ubuntu but we wiped it for Bea. Still don't have wireless but that may be operator error.
I've heard plenty of people say Partition Magic can cause problems with Linux. Others say it works fine. Have you tried GParted LiveCD?
Worked great for me so far.
Take a peek at this guy's website to review the GPLCD how-to I wrote.
The GPLCD guide is after the PCLOS guide. It's aimed at an all-Linux HDD but still gives you some idea how to move around in GPLCD even if you're dual-booting Windows.
Here's a write-up I did on how to take a screenshot from GPLCD in case you want to put an image up in the forum. Wait, I'm not sure you can do that in this forum. I don't see an obvious "attach" button. Anyway, screenshots are so easy with Linux (not quite as easy in GPLCD) that I've started printing screenshots instead of taking hand-written notes. A screenshot of your partitions and hd#'s will almost certainly come in handy later!
If you build your partitions first with GPLCD there'll be less confusion. Just mount the Ubuntu / to whichever partition you already formatted as ext3, whether it's primary or logical.
Too bad you don't have a spare HDD laying around that you can practice on. Much less stressful! [/img]