iPod tip for fitness instructors

I've been looking for softeare to help edit songs... well I no longer have to... iTunes can do basic things like edit volumes, start and stop times, etc!
Yes!
In iTunes, right click on your music file and select the "Get Info" Tab. Another wndow pops up with 6 tabbed sections, choose the "options" tab and this is where all the magic can be done!

Yay! I love the internet!
...
..
.

Music editing software?

Does anyone do this, edit music? I really need to start! I have some fitness songs that are VERY LONG, and usually make me go overtime in my classes :( I want to start doing basic clips of music... you know, deleteing a minute from the end of a track. I'm sure it's very easy to do (and I even bet the MAC comes complete with these capabilities) unfortunately I'm still on a PC and don't think I have any software capable of such tasks.

I was googling this today and found Adobe Audition 2... it only comes with a free 30 day trial however. I only want to do *basic* edits though... so, could a free-ware type of this software do the job I'm trying to achieve?
...
..
.