MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
The hand model as a "whole" is quite tall at Z200.39mm, so I understand why Makerware would want to scale to suit. The largest individual part which is the hand body (6.stl) is 50mm x 113mm x 115mm. The diameters of the lobes of the flexible hinge parts are 5mm and 7mm (base hinge) so if you measure your hand model, find out what the slot diameters are for the fingers and scale the hinges to suit.
Hope this helps,