Moving to Pserver from .rhosts

[Mahantesh]

Hi,
we have working repository running right now. Currently the mode of
authentication is .rhosts.
We are planning to migrate the mode of authentication to pserver. Also
after moving to pserver mode we should be
able have all the versions we have right now. 

My question is, whether it is enough just deleting .rhosts files and
opening port 2401 and making appropriate entries in startup scripts
without doing "cvs init" which creates CVSROOT. for moving to pserver
mode.

As version is maintained in all RCS(,v) files, I think this should work.
I am right? Please suggest what would be the best way to achieve this.

Thanks.
Mahantesh.