If you can group the parts you can use phibuilder to generate a figure. Rigging machinery is fairly easy since there are no bend zones to deal with.

You can also load the pieces into poser as seperate objects , set the hierarchy in hierarchy editor and create a figure from that . Thenn you just need to set the rotatiojn centers for each part, set the dial names and limits , hide the dials that should not be used and that sort of thing. 

Poser 7 has a tutorials folder that has some rigging information.