installing binary packages across windows cluster

Hi

Given a "cluster" of identical windows machines all running the same 
version of R, are there any circumstances where using install.packages() 
to install a package (say, one that doesn't have any dependencies) on 
just a single machine, then copying the resulting installed package 
subdirectory across the cluster into all the other machine's .Library 
subdirectories would be a bad idea?

Thanks,
Ben