Boot Camp Problem

Well this is my first post just wanted to say Hey I'm KRS and I'm from Canada
saw the site while searching for a solution for my problem. Anyways
Here's my problem, I just got a recently new iMac 3.06Ghz and decided to
run
Boot Camp because I play SA-MP which is San Andreas Multi-Player. Anyways
I run boot camp and I'm at the " Install Windows " Menu but The driver is 5gb and I think it's supose to be 10. Anyways I put in my serial and then enter the menu " Which type of installation do you want "
Theres Upgrade and theirs " Custom ( Advanced ) "
Just the simple " upgrade " is grey'd out since its the first time installing it.
So I decide to click on " Custom "

I have a list of drivers and a driver named " BOOTCAMP " which i made when going through the process of making it.
The freespace it has is " 5.6 GB " and here is the problem I come across which on the bottom of the screen shows.

" Windows cannot be installed to this hard disk space. Windows must be installed to a partition formatted as NTFS " Which I don't understand at all since I don't know too much about computers. But now I can't even get into Leopard, When i try to reboot to Leopard the startup grey screen pops up, stalls for 30seconds and then the process to Windows comes up which I can't complete.

Is there a way just to leave the Boot Camp Installation of Vista, I've been trying for about two hours, and can't get anything to work back to Leopard.

I hope any of you can help me out and I hope I havent reposted something si nce I searched and couldn't find it. Well I added as much detail to try to help fix my problem.
-KRS.

 

Ah TEG thankyou bro ! I've trying all these commands and just the press
of a button it switches (= Now I'll try to install boot camp correctly

Edit: Okay I successfully installed Vista (= But I have no internet connect through Vista any help ?