Starting with a JPG test pattern series I created with Photoshop + some scripts I wrote, then converted into an uncompressed AVI, I was able to follow the directions in this thread to make a HD-DVD disk which shows static color squares and some resolution charts and some various text fonts. Here's what it looks like while playing:Click here for full size
and here's the original image it came from:Original 1920x1080 image
DVD MF5 had to do mpeg2 compression due to my AVI source. The resultant output does not seem to maintain vertical nor horizontal resolution - not sure why. There is a 1 pixels wide black frame around the 1920x1080 boundary (1 pixel in from the edge). There is a 3 pix moving dot in the upper right to mark frame progression. The 3 resolution patterns are at 1, 1/2 and 1/4 times Nyquist. The text rows 1 through 6 are 23,11,9,8 and 6 pixels high respectively. Some of the characters in the smallest font row were visible on my Sharp 45. Most were (just barely) readable on the original. Here's a closeup of what I saw on my TV.
The video is 6 seconds long and loops, with a slight jump at the loop. I'll see if I can find any mpeg compression quality settings to improve (already checked the 2 pass box in MF5).
I created an nrg image file but Nero won't burn more copies from it, perhaps due to the 2 warning messages one must skip to burn per the instructions in prior posts. I have built a zip file with the contents you'll need to burn your own copy in Nero. Follow the instructions above, but drag the HVDVD_TS folder from the zip file at http://www.wb5mrn.com/tv/hdtestpattern
(96 Mbytes!) to the left pane before the burn.