Installing FC12 on MBP 5,2

[Henrik Frisk]

Hi,
I want to install Fedora 12 32bit on my MacBook Pro 5,2. I downloaded
the Live CD but that wouldn't boot giving me the following message:

nouveau 0000:02:00.0 PRAMIN flush timeout

and nothing ater that (similar to what is described in this thread:
http://forums.fedoraforum.org/showthread.php?t=234023). If I added
nomodeset to the boot parameters the system loaded but froze before
when the vertical bars reached the end. If I boot without graphical
interface the system boots and I get a prompt but I can't start x
(result = black screen).

I have downloaded the DVD install instead and will see if that makes a
difference (I found a thread that said it might but I can't find it
now...). I will see if the DVD makes a difference and report back any
findings.

I also wanted to ask advice on how (where) to install. I'm currently
in a dual boot configuration (using reffit) with OSX and Fedora 11
which works great. I want to keep my FC11 install intact until I have
everything up and running in FC12 and if possible install FC12 on the
same disk. Is this a good/bad idea? Would it be better to install FC12
on a USB disk to begin with (that doesn't seem good to me but I know
very little about these things).

Thanks for any advice.

best,

/Henrik