Some people have already ported the open-vm-tools to NetBSD. The source is part of of the pkgsrc project:

http://pkgsrc.se/sysutils/open-vm-tools

There are about 1000 lines of patches. But as QNX is more like NetBSD than Linux i would assume that they work in the 
right direction.

There is a related project on this community site named pkgsrc, too. 

I want to share this information to avoid waste of resources.