JP1 Remotes

New to this site, I am looking for info on how to get my comcast remote to allow me to change the picture size (16:9, scan, wide fit) and maybe also the sleep timer if either or possible. I did use the search function but could not find what I was looking for. I read somewhere you can use a 5 digit code to program certain functions. Really all I want from the comcast remote is to have the "HD ZOOM" button allow me to stretch the picture when not watching a HD channel. Thank you for any help.

1. Device: Samsug Plasma 4254
2. Type of Device: TV
3. Year: 2007
4. Remote Model: Comcast DVR "one for all"
5. Have a cable: Yes?
6. Still have the Original: N/A
7. Checked the File Section: Yes
8. Checked Pronto file section?: Yes
9. Partially working setup code: 0060
10. Learning remote question?: N/A

With your remote in TV mode
Press the set button and then

204 or 00204 for 16:9
211 or 00211 for 4:3

If that works, you can do a keymove to your desired key.