[ccp4bb] artificial tetramer

[Fred]

Hi List,
I would like to build an artificial tetramer from a monomer PBD file. 
All that I have is the coordinates it self with CRYST/CELL information 
cards. The artificial 4-fold axis has an arbitrary orientation into the 
cell. I mean, its not parallel to any crystallographic axis and have to 
be at a certain distance of the molecule. This sounds conceptually 
simple, but I would like to do that in batch mode for hundreds of PDB's. 
Could someone, please, tell me the easiest way/program to do that?
Thanks in advance,
Fred