You can get a TV Tuner for you PC.
I'm not sure a Calibration DVD will work because it's in analog format.
If you're TV can display True 1080P, THen you need a grid in 1080P Size.
When I calibrated( and then broke) my TV, I used the memory card slot on the front to display a full size 1080P picture.
I got the picture from this site:
http://www.avsforum.com/
Check it out, They were alot of help when I purchased my tv a few years ago.