Anyone running Linux under Boot Camp?

I've searched Google and these forums, and couldn't find anything, but here's the story:

I tried installing Ubuntu from the dvd I downloaded (yes properly burned the .iso file through disk utility). I HAVE sucessfully installed Windows XP in the past on my iMac 17". So, I opened up boot camp, partitioned, and started the windows installation with my Ubuntu disk in the DVD drive. Started install, everything went well until I had to choose which disk to mount onto. I chose the third disk (the one I partitioned for Windows) and it didn't work. I tried formatting the drive, and it still didn't work. I was thinking, maybe I have to partition the drive, restart OS X, then in disk utility reformat the drive as a UNIX drive?

Come on, I know someone can help me...

are there any tutorials on how to install Ubutnu (full install DVD) on an Intel iMac that anyone knows of? Or has someone done this successfully?

I don't believe you need to use bootcamp, I think you can just install it straight up because it is x86 version.. and i don't believe there is anything blocking it from installing. You can installl linux on the ppc macs, so i can't see why you can't do it on the intel's easily.

are there any good tutorials you know of? if so, links please? I'm doing research myself now.

Also, if needed, I DO have an external hard drive. I might boot off of that for Linux.

i've been looking into putting ubuntu on my imac and i've found some good information. onmac.net is a great source for alternative operating systems on intel macs. in fact, their wiki has a how-to for triple booting osx, xp, and ubuntu. if you try this, let me know, i would love to know how it works.

http://wiki.onmac.net/index.php/Triple_Boot_via_BootCamp_Ubuntu

I don't want to triple-boot, just OS X and Ubuntu.

and how do I install refit? I mean, I downloaded, but what's the root of my Macintosh HD?

all right, I give up. I've tried everything, and it won't seem to work. Oh well, maybe another day.