vcs upgrade

Hi,

Please I like to find out how I should upgrade vcs on 2 nodes cluster.I run that on solaris 10.

The steps are like:
- hastop -local -evacuate ;stop vcs on node a and evacuate group on node b who runs vcs.
- init 1, single user in node a
- apply patch
- reboot node a
- hastart ;start vcs on node a
- hastop -local -evacuate;stop vcs on node b and evacuate groups on node a
- init 1;node b on single user mode
-apply patch
- reboot node b
- hagrp -switch to

tnx so much,
marius