Earlier i had no idea about what acapellas were, but now i found that they are real good thing but it is too difficult to find acapellas for a particular song. I took many pains to find acapella for Linkin Parks "In the end" but i wasn't able to find it. May be you can search it for me please .

As for mixing, I think that the combination of "Fruityloops Studio" and "Audacity" is good enough to have a high-quality remix with hip-hopping beats.

Also Adobe Audition is also quite good,but not for mixing purpose.

Isolate vocals
Music Mixing

Here's something that worked for me

Replying to gamerchick39

If you can (this works best with extended 80's style remixes) find a spot where the verse and chorus are, and find another identical section of the song, where the vocal bits are absent. Copy these into the right channel exactly at the spot where the vocals are. So basically, you end up with an instrumental on the right channel and vocals on the left channel. Then do your invert phase, and it should strip out most everything except for the vocals.

To get a precise edit, you might try doing this in Sonic Foundry ACID where you load the vocal part on one track, and the instrumental part in the other track, beatmap them both, and pan each track to opposite sides. Render the wav then open it in your favorite editor and do a phase cancel.