WPA was a combination of hardware and software limitations. You would have to tackle both and the software side alone would have been a nightmare.
You might be able to get the USB thing to work, however I am not sure what you might have to do. I would probably look first at the old wifime stuff and any hacks made to it. On the other hand they were considered cheap and nasty at the time they were made and you could probably pull something off with a far nicer USB wifi card and a fake access point on your PC, a raspberry pi or something similar.
Is there any use to the Wi-Fi USB Connector anymore or can I just trash it? It doesn't seem to be compatible to AltWFC.
I have one from way back then and it's what I still use to connect. Setting up a WEP access point and locking it down just isn't worth the hassle.
Maybe you're running into issues because it doesn't support OSes newer than Vista. I run mine in a dedicated XP VM.
It's probably be the issue where after logging in once the server won't let you log in again until you restart your games. Some games have this issue with AltWfc, other's don't.Mario Kart DS is giving me problems... The first time I connect fine... I've even played a game with my friend. But if we disconnect, it takes about 10-15 minutes before the systems allows us back in. Is this a known issue?