I have not tried it as your setup mention, i guess it would depend on what basestation type is connected to the DSL modem, is it an Airport Express?
My guess it would be easier to connect your Xbox to an Airport Express and then use the snow as a bridge with your DSL into the snow..
Let me know how it goes.
I have played Halo 1 and 2 and now working on Brothers in Arms. I am happy for a Slayer match in Halo 2 anytime
