It should work, no problem. When you use the analog outputs from the DVD player, you will want to make sure that you set up the DVD player to output a stereo signal, not DD5.1 output. I think this is generally done in the menu for the individual DVD that you are playing.
Are you forced to use composite for video? General opinion is that s-video or component output has better picture quality.
About the subwoofer: Keep it simple and leave it connected via the speaker level output from your amp, especially if this is how you are using it now. Since you are going to be 2-channel only, no need to worry about bass management and all of its potential complications.
Enjoy,
TIC
Are you forced to use composite for video? General opinion is that s-video or component output has better picture quality.
About the subwoofer: Keep it simple and leave it connected via the speaker level output from your amp, especially if this is how you are using it now. Since you are going to be 2-channel only, no need to worry about bass management and all of its potential complications.
Enjoy,
TIC