i have the same issues with edp giving me the blackscreen. the 3100 version doesn't like the new edp for some reason (atleast not on 10.7.5). with the myhack generic extra it boots fine, but i get no sound, when i choose the edp low res extra, black screen.
tried the 630 extra, won't boot at all.
anyway, just trying to make clear the original poster was talking about the intel 3100 graphics, not the nvidia version (they gotta be different dsdt?).