Wanna Install Vista and Xp Pro in a good manner the follow the steps...
In case of XP Installed First..........................
1.First in the Product Key window in vista installation press SHIFT + F10 to launch a Windows PE 2.0 command window. Then type in DISKPART and press enter to get into the DISKPART utility.
2.Now type in LIST VOLUME - this gives you a readout of the volumes available on the system. Select the main Windows XP volume (probably Volume 0) by typing in SELECT VOLUME 0.
3.Now type in SHRINK.if you have some problem then see the help....Which will be shown after typing SHRINK.
4.Now install vista..
5.after installation you will see that in boot menu..........
“Microsoft Windows Vista” and “ Earlier Version of Windows”.
6.then go to vista do whatever you want to do to activcate it...Then go to
http://neosmart.net/dl.php?id=1
to download easybcd ...this tool will help you to configure your boot menu.
If you don't see any entries in boot menu and it directly goes into Vista then click Configure boot in easybcd and give the drive where the Xp is loded.....
I think this will do...................Njoy...