dual boot backtrack 4 ubuntu 9.10

How do I dual boot Backtrack 4 and Ubuntu 9.10 ?
Ive tryed it but i get some 15 error
Answer #1
Have you properly set up two partitions? Do you have both OS installed? What error you get?
Answer #2
Have you properly set up two partitions? Do you have both OS installed? What error you get?
Mate everything is done, swap set, partitions done. Both oses installed and i get
Error 15 file not found while i try to boot into ubuntu. Im only able to boot into backtrack
Answer #3
I think this can help you. It requires editing your menu.lst. but your Ubuntu is not working so maybe you can edit it through backtrack?
http://ubuntuforums.org/showthread.php?t=596869
Answer #4
well i will try it… since ubuntu 9.10 has grub.cfg and not menu.lst
i will try booting into live cd and edit the menu list