Hello,

i dont know u Laptop ,so i cant say witch Distro will suits u well, but i can something about Dualboot.

You should install Vista first, then install OSX with Chameleon Bootloader. This is, as far as i know, standart at most Distro´s.

There u have a full functional Dualboot System.

When u install Vista after OSX, Vista "override" the OSX Bootloader, and u have to manually install it again, something i dont find soo easy

Good luck and have Fun!