need serious help plz...

1st I must say thanks for providing all this help and i hope i get a response to this.

Anyways i did everything u said and all went well...except for the part to set the dual boot. When i insert my vista cd to boot from it, it just bypasses it after a while and goes directly to xp. (N:B - yeah i did set my dvd drive as the 1st boot device.) I really want help with this. Thanks in advance.