HDTV DIY calibration

There are lots of resources out there for calibrating your HDTV. Unfortunately, most of them aren't free. They want you to buy some software, a DVD, etc. I went looking for just calibration images - large ones - to sit and calibrate my HDTV with. Now...my set doesn't have that many options to adjust - but nvidia-settings does! (Or your equivalent video driver software) Anyway - if you're looking for some great images to do your own tuning with - head to this AVS forums post. Here's just a small sample: