|When I added my daughter's Xbox to our network it was in a similar configuration to yours. Xbox connected by ethernet cable to her PC which obtains internet by wireless NIC to the main router.|
Instead of bridging I used ICS in her PC.
Only problem was the router's default IP was 192.168.0.1 ( Same as yours is using)
ICS automatically assigns 192.168.0.1 as the address of the LAN connection in the PC so I had to change the router.
I now use 192.168.1.1 as router IP with all my client systems now obtaining IPs in the 192.168.1.xxx range.
With ICS active in my daughter's pc it's wired NIC connected to the Xbox uses 192.168.0.1 and the Xbox has no problems
Of course I had to reboot all the client systems after changing the router IP but that was a minor inconvenience.
Goin' Fishin' (Some day)