Here's a picture of the settings I used for the screenshot.
Also attached are my settings files, in case someone's having problems with the original prefs or just wants to try something else. You can always revert back to the original settings by overwriting the prefs files and doing a reflash all.
I changed the settings for PAL, NTSC, HighGfx, XTREME and HD720 (all including interlaced). The last one uses a custom 1280x720 60 Hz output mode. Most of my modes only work with DVI as VGA is disabled.