Machinery library

I have installed the machinery library in NX 10.0.3 with MP6

I would like to edit a couple of the files

for example, the socket head cap screws I would like to add face colors so when the subtract the pockets are a certain color

and I would also like to edit the dowel pins and give them a through hole in positive Z and a drill size in negative Z when creating the pockets

Is this possible in the existing files?

Thanks

Brian