So, I've got a dual boot set up and working. I have Vista set up as my main OS and Gentoo as my secondary. When I load Grub though, I have to manually type the root, kernel and initrd commands every time I want to load it, which is a gigantic pain in the ass. I have the linux boot menu item set to BOOT rather than any of the partitions (I have 2 partitions for windows, a swap for linux and the main partition for linux).