I would always recommend converting whatever files you are using to mpg-2 and ac3 audio before bringing them into DSP.
If you do not use mp-2 and ac3 files DSP will convert the files either in the background or while you work and this compression is not as good as Compressor. DSP will create an Mpg-2 and aiff file.
DSP doesn't create AC3 audio it creates aiff files which are uncompressed. I would make sure all of your audio is ac3. The new files that are created by DSP are put in the folder with your project file. Use Compressor to convert to Ac3.
I am not completely clear on how and what you are swapping out. Are the images in a track or a slideshow?
Is the 4GB movie HD or SD?
Are trying to create an HD DVD?
It does seem to be the file, because I was able to burn a DVD with a former file with no problem.
I wanted to convert this AE file through FCP and Compressor, but compressor won't let me complete the action. I get as far as selecting the destination and settings, and when I press SUBMIT I get a second window requesting a name, but its submit button is greyed out so my only option is CANCEL. I don't know what I've done wrong; I've done this many times.