Subtitles on a podcast?

Question

The fact:
I have a a podcast in 16:9 aspect, at 640x360, in catalan. I use MPEG Stremclip to made a mpg4 from a mov exported from an Avid project.
The desire:
I want add subtitles in english on the bottom of the frame. The idea is full the aspect until 640x480 to make easy read it an to keep compatible with iPod, not only to see in the computer.
I tried:
I use Macaw to make a text (Is great, but is there any app better?), add it in a QT movie, move the titles to the bottom and resize. Then I have my mov with titles. All right.
The problems:
I can play this mpeg4 in QT on a computer but can't sync in iPod. The reason maybe, is the titles are a text track not avalaible for ipod or podcasting.
The solution;
Probably burn the text track with the video track will fix the problem.
The questions:
Is this a good solution?
There are another better?
What workflow is easiest to obtain it?
There are app for windows to do that? (my work is not really Apple friendly....)
Is possible put titles in others ways? (QT has option about titles....)
Is possible put chapter marks in a podcast?
Is there a web with information about titles, podcast with features, ...?
Thank You:
Any help will be great for me.

Answer 1

Thanks
I found information about subtitles and I tried it.
Finally I prefer make a burn of the 2 video track and text video track in one video track.
I made many exports from QT, MPEG streamclip and ffmpegx.
Most of them put all in 1 video track (640x480, H.264, AAC) like I want. But only few of them can sync with iPod 5.5. The message is "this is not a format for iPod" .
Any idea?
Thanks a lot.