Installation under /usr/local instead /usr

[Paulo Henrique Baptista de Oliveira]

        Hi Debian users,
        I installed Debian in a PC to my friend, but he wants that the Debian 
programs stay at /usr/local instead /usr to export them to other machines via
NFS.
        Is there a safety manner to transfer /usr to /usr/local?
        Thanks,         Paulo Henrique