Then I ran across a tag library at developer.novell.com/wiki/index.php/TagLib_Sharp that allows access to various languages' media tags. I downloaded the tag library and saved it to my computer. Then I wrote the code
cd "D:\Multimedia\Film\Music Videos"
foreach ($f in dir)
$mediafile = \[TagLib.File\]::Create(“D:\Multimedia\Film\Music Videos\” + $f.ToString())
$splitName = $f.Name.Split(”-.")
write-host $splitname\[0\] $splitname\[1\]
$mediafile.Tag.Title = $splitname\[0\] + "-" + $splitname\[1\]
$mediafile.Tag.Performers = $splitname\[0\]
to parse my music-video folder files and populate the tags accordingly. Obviously, you can change how the script works and what it populates, but this script will give you a good start. You need to modify the script's first line (at minimum) to show where you saved the taglib DLL.
Once I executed the script, all my media files' title and performer tags were populated.