Custom Resolutions in Linux

I have been thinking about the possibility of rebuilding my HTPC as a Linux machine. I have worked with Linux in the past (way past, about 1997-8) and not much since, so I first need to update myself as to the changes since then.

However, I have a few questions for the more Linux inclined about potential HTPC uses.

1. I assume there are open source DVD applications - correct? Any suggestions.

2. Is there any program that can be used to set custom resolutions and timings? I have an HDTV and a VGA -> Component Transcoder, I need to be able to set resolutions.

3. Is it even worth it or might it just be a bigger pain?

4. What is the best front end?

1.Your choices are pretty good for a dvd player. There is the two most popular in Xine and MPlayer. Both have very good front ends.

2.As far as resolutions go I'm not too sure what you are talking about.

3. Its pretty easy to get things set up and running. A Distro like Mandrake is pretty easiy to set up.

4. front end??