Partitioning for multiple O/S’s

First, I’d like to say how great everyone in this forum has been. I perform local upgrades, repairs and builds and recieve a lot of phone calls for help. Can I partition a hard drive (250GB W/D), install several different Windows operating systems (XP Pro, Home, 2000, 98) and boot on demand to view what clients are talking about as opposed to having different computers with different O/S’s like I have now?