Program To Rip Voices From Songs & Put With Music From Another Song

Hi,

I have a collection of around 2000 songs & i'm looking for a program that lets me mix 2 songs together to make my own remixes.
i currently have fruity loops studio 6.0 producer edition, ots cd scratch & ots turntables.

The thing is, they are only free trials & most of the stuff can't be used as it's locked.
Does anyone know of a decent program that would fit the bill?

I'm also looking for a program that lets me take just the voice from 1 song & the music from another to make it my own song, for instance:

Take the words from Oasis's Cigarettes & Alcohol & add it to the music from Nirvana's Smells Like Teen Spirit.

I would mostly be using this to make my own mixes from classic dance/rave/trance tunes & would appreciate some help from
the good people of afterdawn.

Thanks
<*.*>