If your missing "comdlg32.ocx" you can get it
here. Just put it in "C:\Program Files\Epicoder" or wherever you had epicoder installed to.
As far as when you encode a file and it stops after first pass, this is a problem with epicoder itself, it cannot do bad audio parts, if you do have this problem, use virtualdub to save the wav, and just take out the audio. Then run it through epicoder as video only, then once that is done, just open vdub again and add the audio, then encode the audio to what u want it. Make sure you go into interleave, and put in -35 or your audio will not be synced with the video.
what codecs and which programs does this use (h264? xvid? )
This program encodes in xvid and divx, it's one of the most popular encoding profiles.