It works !
using a wav to midi file prog. and then using editable notation in biab i have removed the sax. and extracted the piano and bass parts out of a song to the melody and solo tracks respectively. Next i created a new wav file.
Now to replace the drums that are lost in the conversion from wav to midi file.
I imported the original wav file (complete song) to realband and created a tempo map (thanks rharv). Using this tempo map I added drums. I then brought the new wav file in (piano/bass) and ran acw again but just to give me beat 1 bar 1. I then lined up the two wav files. Lastly i removed the original wav file.
The result is i have the original song i wanted minus sax. to play a transcribed solo along to.