When I usd a PC with WinXP I had the network connection going into the PC, then I plugged in the USB wireless network adaptor and switched on Internet Connection Sharing. Then it went something like Share THIS connection via THIS peripheral. edit: turn on ICS:…
Thanks for all the help, but as it turns out, the DS doesn't work with ad hoc networks. It can find the network, but I get a 51302 error "Unable to connect to a access point" when I try play. My last chance is SoftAP which seems to turn the adapter into a AP with should work.