Networking/Media Streaming Issues

So I'm trying to connect my pc w/ media to my xbox for streaming.  Only thing is due to my convoluted network  and physical space constraints, the two end up on different subnets.  The xbox wired to a regular 4-port router (vonage) and my media pc is connected wirelessly to a wireless router, which is then connected to another port on the vonage router.  Is there any thing I can setup in the vonage router that can get these 2 to talk to each other or am I gonna have to give 100bux to microsoft for a wireless adapter?

Need: model # of vonage router, and name/model of wireless router