Thanks for taking the time 'eggmedia'. It was nice of you to try to help. Actually, I had tried this already. No go I found the link for the 'sg726acm.cab' codec download, probably in the same place you did, in this forum in a post by 'smartin22' if I remember correctly. After following many methods including the ones you mentioned about WMP settings and Internet Security settings etc... I forked out $35 to a 'Microsoft Support Professional' for answers. Nothing he advised was any different than the advice I found on 'Techzonez Forum' and other websites or what I had tried on my own. The last bit of advise from the 'MSP' was to contact Panasonic to see if they had a codec that would enable WMP 10, 9, 8, 7, or 6.4 to play the .asf video files. It seems as though it was just another $35 down the drain. So far, I have been unable to find anything on Panasonic's website about codecs for playing .asf video files. It's a bit strange, since this is the format some of their cameras produce. I submitted questions about this to Pansonic's support and customer service, but haven't heard from them yet.
Now I'm waiting to hear from my Japanese friend (I live in Japan) as to what software came with his Panasonic SV-AV50 (d-snap) digital video camera or what media player he uses to view the files it produces. If I get these pesky .asf files to play in WMP (any version) I'll be sure to post the solution.

Thanks!

Sincerely,

Michael Slaught