nope, you need to install a modified version of snow leopard to make it bootable into any computer that is not a mac. You can't use a legitimate mac installation in a PC, even with a bootloader such as iboot, it will make the drive visible, but the OS would kernel panic or simply not start. You will need to install a modified Snow leopard installation onto the harddrive, its not really that hard, all you really need is a bootloader, and another mac (you'll have to use Disk Utility before to prepare the drives and rip the snow leopard dvd into a .dmg, so the file can be altered freely). Google is your friend with this.
Edit: In retrospect, it may actually boot your backup. Install Chameleon RC5 into the hard drive you have Snow Leopard in and want to use on a PC. Then try to boot from the hdd, if it works, congrats, if it doesnt, make sure you backed up your ****!