so far the d620nvidia will not give graphics acceleration, so things lockup terribly like launchpad and safari top sites... i didn't care to find out much more after that
and it needs alot of old kext and kernel support.
d620 nvidia has nvs110m /go 7300 the black screen is a known issue with 7xxx cards and the driver. from what i understand switching the resolution wakes it back up but kinda hard to do it as you cant see it. if you close the lid and open it it should wake the screen.
now on d620 GMA you need to add a system bios password, there is also an option in bios to tell it to bypass passcode from wake from sleep.
there was a fix for that in edp fix section. not that it allows to use mirrormode but it would at least get you back to extended mode
try playing with switchresx.app and see if it helps it is trial ware though
if your using an old distro of edp with myhack wich creates myhack.kext in s/l/e and 0edp.kexts is still there they will conflict with each other. so please use the newest versions of both edp and myhack, both methodes are tied together so using old methodes with new just because edp 2.1 "is on hand" causes issues.
the blue tooth has to be either switched from bios or set to use the switch on the left side, multigestures do not work on the trackpad, you can try choosing different trackpad options, you can update edp to the latest there are a few more options
the atheros card is a no go, but the RTL8187B might have a chance if you fing working kext for it, neither will work out of the box so to say like some dell wireless cards do.