That's actually the tutorial I used in the first place. In the prefabs section of his site he has an example of the portal, but it's in .pfb format. I don't know how I would open a Printer Font Binary in GTKRadiant, but if i could, it would be a huge help.

I tried moving the camera into another room, but it still doesn't work. I'm really new to GTKRadiant, so what's the PVS?

Well, i should start from the beginning. I am working on a map called "Lockdown". In the map, I plan to make a "master control room". I was going to use the camera portals as surveilence cameras, even though I don't think they can see players(or can they?). when i had one of them...