I cant believe you sent someone to Xing.
Yeah, pops do rock and so does crappy quality!!!
oops, no they dont, guess Xing isn't good after all too then, they were both dreams.
Dude - If you wanna do this you can do it with LAME which happens to also be a good encoder.
Use RazorLame if you want a nice frontend for it.
Make sure you set the output directory to be different from the input one otherwise it cant do it and will give you an error (it'll be trying to write the original file name as a .mp3 file in the same dir so will obviously have problems as the file will already be there).
Not gonna give you the best quality music but that's not what your after - make sure you dont share these new files for distrobution with other people cause the quality will truely suck.