Do you have lots of music files in lossless or good quality formats such as flac or ogg?
Do you also have an mp3 player that just won't play your good formats but can't hold all your files?
Then this is what you're looking for!
Music2MP3 batch converts files and maintains the original directory structure. Just select the files you want converted, pick the root folder where conversion should start and set an output directory. With the click of a button all selected files will be converted and the destination directory structure will match the source.
This application requires the .NET Framework to be installed, which is available via Windows Updates.