buy the "SLINGBOX" ($200 to $250 from best buy, fry's, comp usa, circuit city, ect.) then hook your sat box to the slingbox and your computer to your tv (you should be good to go .... ANYWHERE in the world with that set up) ... talked with some people who have it and they love it and the slingbox won all sorts of awards to boot. you should check it out www.slingmedia.com
remember you can go from your computer to your tv by using the s-cable connection (if you have that card on your computer- I have a laptop and I have one) or use the red, white, and yellow cables (again if you have that capability)
if not ...
you need a tv tuner card. again the stores listed above can set you up.