AppleTV workaround WPA2 Enterprise

I live on a college campus with only WPA2 Enterprise wireless internet access. This is not compatible with Time Capsule or AppleTV. I hoped that if I were to use internet sharing on my mac, I could share my wireless network through my time capsule (via ethernet cable) between my iMac and AppleTV --at least temporarily so that I could get it setup and do periodic updates.

Any ideas?