need some help, looking for some type of MP3 mixer/recorder program

[kemystery]

got conned into providing music for a post Halloween Party (2nd Chance?) coming up this and I d'led plenty of tunes but want to mix the dead spots out

- Is there a freeware type program that will let me

A) remix the several tracks of music into a wma./MP3 type file and play it that way

B)mix the music 'live' from 2 media players

sorry If this is the wrong forum, mods plz move/ban appropriately. I did actually google many forums and sites that seem to offer what I'm looking for for free or cheap- I was hoping some poster might be able to help me out in selecting a program that is simple and suits my needs.

any help is greatly appreciated, party is on Sat so I have some time work w/ the software