Double Boot Error

Okay, trying to set up a system with dual-boot Vista and XP capabilites. Vista installs fine, but after attempting to install XP (which does install fine), instead of XP loading up and allowing me to finish the set up, it gives me a command of "Error loading operating system".

I've tried several reinstalls of both OSes in order to get it to go, but each time I run into the same brick wall. Some assistance would be appreciated. Thanks.

 

Vista installs fine, but after attempting to install XP (which does install fine),


No,no,no XP first Vista second.That's the boot order.

 

http://support.microsoft.com/kb/927817/en-us
http://support.microsoft.com/kb/555852/en-us
http://support.microsoft.com/kb/305873/en-us
http://apcmag.com/how_to_dual_boot_vista_and_xp_with_vista_installed_first__the_stepbystep_guide.htm

Generally speaking, Vista must be installed first. The last link has a good step-by-step with screen shots on how to set up the dual boot system with XP and Vista.

 

The problem is, I followed the instructions to the letter following that page, and right about the point where it's supposed to reboot into XP is where everything goes haywire.. I also tried Computer Shopper's method and came up with the same problematic results.