Yup, just tried it and it works.
I have the file if anyone wants it
It lives in /bin on the audrey,
You will need to chmod +x fs-nfs2 to get the correct permissions
Sorry if I repeating stuff but the line to use it is.
fs-nfs2 serverip:/share /mountpoint
The positive thing is that although I got a bunch of drop out and stuttering when playing the mp3 over my samba share, in nfs it is smoother not perfect but a lot better.
I think I am going to rip out my qnxrto 6.1 install and get the 6 installed, at least then I could start on some other things.