You use this TV Tuner, and then, rou plug your console in whatever output it needs. If you want a cable AND console in it, that's very possible. I believe they have another port saying IN, which lets the TV in...but I don't remember the GC and XBOX's RF.Excellent.
Here's the UK one
http://www.overclockers.co.uk/showproduct.php?prodid=GX-027-HA&groupid=701&catid=56&subcat=169
I guess it's a very good choice indeed. If I were to connect my consoles up to my computer somehow, would it involve using this TV tuner in some way? Or if I need additional equipment? .. I'm guessing I will, but is it OK if you could tell me what please?
Thanks in advance.