Can cvs-sup Upgrade a 5.3 system to 6.2?

[Andrew Pantyukhin]

On 3/28/07, Martin McCormick <martin at dc.cis.okstate.edu> wrote:
>         The system is up and running, but presently not in production.

cvsup (or csup, available from ports) can update /usr/src
from any version to any version. If you try to update it
to 6.2 on a 5.3 system - then, yes, you'll succeed in
rebuilding world and kernel, and installing them.

Please refer to the last parts of /usr/src/UPDATING and/or
Handbook for further info.