Upgrading GW 2012 SP2 to GW2012 SP4

Do I simply select Create or Upgrade a GroupWise System
run through the installation
and select Update > point to domain


I just seem to recall - it was necessary to Install / Configure Web Access and GWIA

May be I'm confusing it with version say 8 > 2012 update

Actually, I've just done one as a Test

Started the agents & Monitor shows DOM, PO & GWIA at 12.04

Just checking ... appreciate any comment...