the easiest way to dual boot (since you have more than 1 hdd), would be to install leo on one hdd and vista or whatever on another one. usually on newer mothertboards, pressing F8 at boot will bring up a boot menu where you can choose which drive you want to boot from.
i know it's not the most elegant way, but it will work 100% and it's really easy.
be sure to have the drive you want to install leo on sata1. i get the "still waiting for root device" if the drive is not on sata1.
i don't know about you dvd drive, it says in your sgnature it's scsi, i have an ide dvd and in order to make it work i had to install it as a master on the first connector on the cable (strange, i know).


see guys, this time i did not link to my other post

PS: whay would anyone think i tried to "glorify" my install? it's not like i made the distro, i just became intimate with google in order to make it work
i linked to my post since i thought that there are other informations there that might interest, and also i don't really have much free time, that's all. and i only did it twice, not "many" times