You can use the HDTV template and crop the Quicktime file in an editing program to meet NTSC standards.

Suggestion:
For really high quality HDTV, use a higher resolution, such as 1920 X 1080, and publish out at 720 X 480 uncompressed (Avid Xpress DV takes this, while Final Cut Pro needs 720 X 486, do what makes sense for your editing system). Scale the file to 720 X 540 in a video editing program. Export uncompressed. Then Use After Effects non-Interlacing filter (settings: 0.8 to 1.2) to blur a bit which will keep jagged lines from showing up. Export out of After Effects uncompressed.

You can then use the higher (1920 X 1080) resolution for your HDTV output. You will probably still need to use the After Effects non-Interlacing filter.

NTSC (4:3)
720 X 540 pixels
33 pixel action safe
66 pixel title safe
(for older tvs)

Download template

HDTV (16:9)
961 X 540 pixels

Download template

Why do I remember using 640 X 480?
In Flash this lower resolution will produce flickering, strobing, and bad news.

See Quicktime link on the previous page for more information