Here's a perl script I hacked together. You give it a directory of .lrc files, tell it where your mp3s are and it will run lrc2sylt for all the files with matching names.

It will search recursively through both the dir you specify for .lrcs and the dir you specify for .mp3s, looking for matches. There are a couple option that are described by running:

lyrictagger -h

It's written for Linux (other unicies are probably fine) but if anyone wants to port it to windows, have at it. It also requires ynot_'s lrc2sylt prog.