|You can have almost an unlimited number and kind of OS's on a system. See the thousands of articles on how to dual boot.|
I'd suggest that you run a virtual machine such as virtualbox or others. That way you don't have to worry about your main install. See also VMware's Virtual appliances, prebuilt OS's of every kind.
For most 32 bit OS's you may be limited on your ram by up to half as much. Your system will support older 32 bit OS's.
Playing to the angels
Les Paul (1915-2009)