EDP seems to be working fine now but doing a system build on my system causes it to not boot. I've followed the instructions from post #2 here: https://osxlatitude.com/index.php?/topic/2032-dell-vostro-200-snow-leopardlionmountain-lionmavericksyosemite/ in step 3 I have to use pcirootuid=1 instead of graphicsenabler=no in step 4 I don't need any extra commands step 6 causes it to not boot so I have to use myhack to re-install generic bootpack. So at the moment I appear to have a working system with generic bootpack, not sure whether this is normal or not but it works.