Contact Chris in this thread. http://www.cnczone.com/forums/showthread.php?t=19487 (Hypermill user check in)
He posted at the bottom of the thread and works with micro machining at a level you could relate to.
Turbo blades, impellers, single and multi blade with or without splitters can easily be programmed in hyperMILL. I would be happy to look at one of your files.