I got mythtv working on my crt (monitor) and on my tv. I can't have both my tv and monitor on because the K8ngm2 won't support it, but I can have one at a time, which is all I want. If you want to know how to get both your tv and monitor working, here's the best guide: http://en.wikibooks.org/wiki/NVidia/TV-OUT. So now I just turn on my computer, run my script, hit ctrl-alt-f8 and mythtv is on tv.
(See this thread http://www.nvnews.net/vbulletin/showthread.php?t=67964&page=3&highlight=8762+tv-out
comment #39 if you have this motherboard and a digital monitor, there's a complete xorg.conf file).
(I know this sounds boring, but it has taken me several days to figure this out.)