help with multi-boot please

I just made a 5GB partition for windows XP. I formatted the hard drive and installed windows 7, then XP

windows 7 made a 100MB system partition. for some reason, that is now the C drive. I tried using EasyBCD to create a multi-boot setup with no luck. before windows loads, a screen flashes saying "boot.ini error" and it loads Windows XP

so right now C: is 100MB system reserved, D: is windows XP, and E: is windows 7

how can I get this fixed?