The script listed below takes arguments in the following fashion. either you can specify a single file name to convert or you can specify a wildcard as example 2 shows.
Example 1: Flac2Mp3 01-The Black Parade.flac
Example 2: Flac2Mp3 *.flac
To use this script just copy and paste the section below and to a filename Flac2Mp3 and the chmod+x Flac2Mp3
If you have any questions please feel free to register and post a comment and i will do my best to answer.
make sure that the (lame) package is installed if you using fedora / centos