my sons is a 0.81 motherboard, but i brought a 0.79 wifi instead, and had connection to the net, and memory card, but no ahdoc, it wouldnt let me play multiplayer games, some would most didnt.
so i brought another wifi board, the right one this time, installed it again, and tried it, it was the same.
i could play the internet, memory card, but multiplayer games didnt work.
so i did some reading, and found out it was the mac address that was causing the problem..
to be honest i dont think it matters, which one u choose..but i arnt sure..
my sons has custom fireware on it. dark alex 3.40, and with custom firmware u can change the mac address, you cant change it without having custom firmware.
this is a good guide which i used to change my mac address, but the mac address he shows you, is for your wifi board.(the one with your psp name on it)
if you go onto NETWORK SETTINGS, and make a TEST connection to the internet, then you PSP MOTHERBOARD's MAC ADDRESS is there. WRITE THIS ONE DOWN, so when u change it, you change it to match this one, otherwise it wont work.
the video says you can change it to what ever you want to, well you can, but you ahdoc will not work if theres 2 different mac addresses.
ive applied a link below to show you how too, you also need to download the 2 files, which are link to the video, at the top right hand side.
HOW TO CHANGE YOUR MAC ADDRESS. Hope this helps