|I don't think that would work. As you know, the Windows XP CD & the Windows 7 DVD have to be bootable in order to install them. The boot code and setup is different for each version, and has to be in the root of the disc. You cannot have two boot codes and setups on the same CD or DVD. How is your system going to know which one to boot from? It will get confused so it will just not boot at all.|
if it was possible to do what you want, somebody would have done it by now.