FreeBSD-Update and 6.1

[Matt Bostock]

Pietro Cerutti <pietro.cerutti <at> gmail.com> writes:
> You just didn't get the point. freebsd-update is not aimed to upgrade
> a box from one version to another, but to apply security updates to a
> release.

Understood; but Colin Percival (freebsd-update's author) does publish
upgrade guides on his website for upgrading from one version to
another (daemonology.net).

With this in mind, could any one offer some advice as to how to upgrade
to 6.1 with freebsd-update?

Many thanks,
Matt