This is an article you will rarely find on the web. If you have WinVista running but for some reasons you want to install WinXP. Then here is guide
Simply boot from WinXP CD and install XP on any partition other than partition where you have installed WinVista
After installation you will have no boot prompt to run WinVista.
Download and install EasyBCD
Run it you will get this error. Click Yes
Now Select C Drive (this is the active or boot drive)
Select the Drive where WinVista was installed mine D:\
You will see this message. Click OK
You will see the following box
Go to Add/Remove Entries Section. You will need to enter the Details where XP is installed. Select Windows NT/2k/XP/2k3 in Type: box and in the Name: Type Windows XP, Now in the Drive box select the Drive where you have installed XP recently. Then Click Add Entry and then Save. You can also Select which Entry should be Up and which should be Down
After adding WinXP boot entry Go to Change Settings Section and Select which OS should be default and alos enter 30 as the Bootloader Timeout: , Now Save Settings.
And you are done! Better luck
