Windows 7 Triple Boot issue?

Hi,

i wanted to give windows 7 ago, and before i installed windows 7 i had dual boot running all fine, like installed XP, and vista later on,

but when i installed windows 7 it doesn't show in the boot up menu only Xp and vista, but if i go into the bios setting and change which hard drive to boot first and swap it, windows 7 boots straight in,

now before i installed windows 7, i partition a drive from my vista HDD and installed windows 7 on that??

now all i need is how do i get windows 7 showing up in the boot menu along with XP & Vista??

and i tried using vistaboot pro but i get error messages, and i also tried something else, that windows 7 will show in the boot up menu if the disc is in the drive before boot up?? very weird...


thanks