Go to Maniactools.com and download two programs for a free 30 day trial. Then buy them. You won't be disappointed in their performance.

MP3 Tag Editor-Often the tags contain the correct info regardless of the odd names you may have down loaded. After editing all the tags, if necessary, this program has the ability to bulk rename your titles using your preference and the info in the tag. For $24.95 it is a bargin and quick.

AUDIO CONVERTER-Converts WMA files (and others) to MP3. Simple and easy to use. Again, for $24.95, save yourself time and effort by using these well conceived programs to do exactly what you are trying to do.