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.
just make sure to get a fresh bootpack from our downloads section and use my hack 3.1 to build the pen when it asks for an extra folder point it at the boot pack. after install; install edp3 using terminal commands