Building an MPEG2-DVD file will not use the preview files, so it will not have some orf thr same DV codec problems. I just use 7Mbps High Quality CBR for anything less than one hour.
WMV works fine if you just want to play it on a PC.
The reason you get that message is that you have a stereo master. The program is complaining that it doesn’t know how to upmix to 5.1 for you. So import the main sequence into a new sequence with a 5.1 Master audio track. Then adjust the adio that you recorded on multiple mics…. but you probably didn’t…. So use Stereo instead of 5.1
Remember that the presets are just presets. You can change them to suit your needs.
Steven
http://www.stevengotz.com