OK! This is a significant advance!
It now boots at 1080i, and virtually the entire screen is visible (a small amount of it hangs off on the top and bottom, as well as the sides as it did in Windows, but not half of the screen as it was before). However it is still not readable something is up with either the sync or DPI or something. I can take a picture if you like.
Here are my files:
Edit: Going to try the same thing with the other custom modelines to see how it looks.