Can you install two different operating systems on the same partition?
Download Virtual Box for windows, then you can run has many operating systems has you like, providing you have enough memory. you will need at least 1 gig of ram, each operating system runs off 256 megs of ram there for you could run 4 operating system at the same time. jump from one to the other, in a virtual machine, the best about running a virtual system is you can delete the operating systems a will, without messing up your system, so lets say you get a virus in XP you just open VB and delete xp from the system, If you do a dual boot system then you have to close down, reboot to get at the other operating system you can download virtualbox from here, http://www.virtualbox.org/wiki/Downloads download the manual at the same time and follow the instructions for installing it and installing other free operating systems that are available from here.