Firstly, great short guide! I already did exacly what you wrote but it's helpfull for new comers.
Now to my problem.. I have a laptop with a genuine vista recovery partition which I don't want to delete. Therefore I want to install SL with the current MBR setup, I booted into the installation after loading Empire EFI and the setup itself, I just can't figure out how I proceed with installing on MBR. Could you help me out please?