Need multiplayer stuff.

OK, I'm sick of searching. My bro just got a PSP and I already have it running 3.90 M33 and I have a PSP running 3.90 M33-3. I need three things PLEASE.

First: I need emulators with Wi-Fi multiplayer. I think SNES9xTYL has something called NetPlay but I have yet to experiment with it.

Second: If you Google "multiplayer PSOne for PSP" you'll eventually find some old news about PSOne Ad-Hoc between two PSP systems running the same game. Has this been released or is it bunk?

Third: Give me some sweet multiplayer homebrew. No Pong please. I mean DOOM and stuff with more... depth?

Please give me exact names of programs or, even better, links.

Thanks.