So here, I will share my experience when I did my first triple-boot to give you an idea on where to start.
I used my laptop, with a 80GB hard drive, partitioned it into 1 primary and 1 extended partition, dividing up the extended partition further more. I used Fedora 10, Windows Vista Home Basic, and Ubuntu 9.04 respectively.
So basically you have 7 partition all in all. One thing to notice is that I’ve created a swap for each linux distro, it is not necessary to do it because I later found out that both distros use both swaps making my swap a total of 2GB.
Now, I installed Vista first so I wouldn’t have a problem later on restoring my GRUB. Next is install Ubuntu, basically you do as you do it on dual boot. Lastly is Fedora, there are 2 options, use Fedora or Ubuntu’s GRUB. Each are the same, but I preferred using Ubuntu’s GRUB (I didn’t install the Fedora’s GRUB during its installation). Then you add Fedora’s boot partition in Ubuntu’s /boot/grub/menu.lst like the following below,