Hey, sorry if this is in the wrong forum, but near as I could figure, this one was reasonable

I have an MN-740 wireless adapter from when I originally had an Xbox and wanted to go on Live. I eventually got a 360, and started using the adapter for that, while my Xbox gathered dust for a few months. Now I've finally installed XBMC on the Xbox, and everything's going great... except that I still have just the one adapter. Seems silly for me to blow near 100 bucks on a X360 wireless adapter, or some other gaming adapter, but it's equally dumb for me to swap it back and forth, like I'm doing now. My wireless network is managed by a Linksys WRT54G, with stock firmware. Is it possible for me just get a wired switch and have it's connection coming from the MN-740? Then hook up the 360 and Xbox wired?