bugs with older asf files

I am converting (or want to) a large set of asf files created from 1996 to 2003. They are set at 160x120 screen size and 12khz mono audio fromwhat I can see. I uploaded a couple and they of course get stretched and pixelate to a bigger size, but the audio stays ok. You can see a test on our mockup site http://www.musictvblogger.com/video/vie ... r-musictv/ of the lowest resolution and here http://www.musictvblogger.com/video/vie ... the-blues/ for the highest resolution (all at the same 160x120) format.

The files encode, but the picture is not made. Can I make a picture and just place it? Can I pre-encode these smaller and get them up at original size? Can I set the encoder on the server to allow these to upload before I bring the site live and then put it to the larger sizes?

I have a huge library of these smaller encodings from the old days and want to get them on before the launch on the main site.