Bootcamp - how many OS's ?

[MRU]

Just wondering I have 3 drives in my macpro as is. 2 for mac, and 1 smaller one with XP.

I was thinking of putting vista on another drive but wondered can you choose to boot the 3 operating systems at startup or is there a limit to two ?

Can I have a vista drive, an xp drive and my mac drives ?

 

[72930]

I don't know about vista and XP, but there are people who have triple booted linux and XP, so I assume it is possible.