Hi Don,
You just need to go set your audio bitrate, subtract that number from 1000kbps and you get the video bitrate you can run while keeping the combined throughput under 1000kbps.
You'll probably want to use AAC compression on the audio if that fits into your specs. It's impossible to hit that bitrate without compressing the audio anyways, as 24-bit/48kHz stereo PCM is more than 2000kbps.
IHTH
JC Boulay
Technical Director
Audio Z
Montreal, Canada
http://www.audioz.com