vista ultimate, xp mce dual boot problem?

i have had xp and linux installed in a dual boot before with no problem because i can just use the linux boot loader, but ive never managed to get two windows OSs to dual boot, i am getting my vista ultimate in a day or two, but dont want to lose my mce, anyone know of a guide or have any advice for me? thankyou.... :major i-CONICA :major

 

Here is the guide that worked for me:

1. Install XP on one partion or hard-drive

2. Install Vista on another partion or hard drive.

Seriously, it should be just that easy. However, here is a detailed guide with screenshots, should walk you through the whole thing:
http://articles.techrepublic.com.com/5100-10877_11-6157570.html (Important note: the guide is wrong about you needing fancy software to resize existing partions on your hard drive, you can do it from the command prompt available on your Vista disk itself)

Let us know if you need any further help.

 

thankyou, these oses will be going on the same disk but in differant partitions, ive had problems before with the mbr and the new os overwriting it, ill follow the guide though, thankyou..... :major i-CONICA :major