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[angelina83]

..

[wee haggis]

https://www.videohelp.com/avi2divx.htm

[funkguy4]

Use TMPGEnc to concatenate the two MPEGs into on long string, then, load up the MPEG in VirtualDubMod and encode away into XviD. Do two-pass VBR at a bitrate determined like this:
In BASIc (lol, I just finished taking BASIC as a mandatory class in summer skewl, what a waste, )

INPUT PROMPT "HOW MANY SECONDS OF MOVIE YOU GOT? " : TIME
INPUT PROMPT "WHAT IS THE BITRATE OF YOUR AUDIO IN KILOBITS? " : AUDIO_BRATE
LET VIDEO_BRATE = (5734400 - (AUDIO_BRATE * TIME)) / TIME
PRINT "YOUR VIDEO BITERATE SHOULD BE:";VIDEO_BRATE

LOL, my first attempt at a useful program made in BASIC. So outrageously dumb, but I've got time on my hands.