Mixing in a microphone words into existing mp3's

[KE7FEG]

How, what program, and any help doing this. I have
existing 'music mp3's' I want to add comments to at a
lower volume than they are w/o altering the length of
the recording. Kinda like a microphone on a karaoke
player does the mixing only on the mp3 permanently so
I can burn a cd of it and play back on a cd player.

I am running PclinuxOS. 

TIA

Ed/ke7feg

*****/////*****/////*****

Ed Culbertson/ke7feg
Remeber Katrina? 
For several days, only hams could get out, 
and talk to others dependably.

No Morse Code required for Technician class licensee's. Interested? http://www.arrl.org/

Long live Knoppix, and Puppy Live Linux cd's.

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com