I just built my own dist for the WSPro that runs off of an NFS mount. Took about 2 weeks of tinkering but I did it with nothing other than 2.4.18-pre3 and a lot of patience.
I simply compiled the NFTL drivers, fdisked the DOC into a single partition, mke2fs , dropped onbusybox and libc 2.2, and wrote up a /sbin/init script to mount nfs, pivot_root, and execute the new /sbin/init off the server, and glued it all together with the lilo-mtd version I got from the web.
Didnt use a single M-sys software product to go from QNX to Linux.
Now if I can just get X 4.x to work better.