Will this work?

[ferry]

Imagine this situation

2 xboxes, 1 pc, 1 cable modem, 1 wireless router, 1 wireless network access point, 1 network card

I connect the cable modem to the router and the router to the pc via network card. Connect 1 xbox to router via rj45 cable. Connect other xbox (downstairs as a media player type thing) to the wireless network point to stream divx etc to with xbmp

Will that work?

[sonar]

it should, as long as everything is setup and you have the wireless bridge setup correctly