Uninstall Vista from Dual Booting XP-Vista Completly?

How can I uninstall Vista with its boot options from a dual booting XP-Vista system and get my previous XP only. and which of this is right. http://answers.yahoo.com/question/index;_ylt=Ap5s0JPOPtdtdizhxOjhpa8jzKIX;_ylv=3?qid=20080722124737AAg8hkx or this one... show more How can I uninstall Vista with its boot options from a dual booting XP-Vista system and get my previous XP only.

and which of this is right.

http://answers.yahoo.com/question/index;_ylt=Ap5s0JPOPtdtdizhxOjhpa8jzKIX;_ylv=3?qid=20080722124737AAg8hkx

or this one

http://www.tech-recipes.com/rx/1040/vista_how_to_uninstall_vista_dual_boot_machine

THANKS IN ADV
2 answers 2