Getting latest pkgsrc via CVS ?

[Dario Niedermann <dnied%tiscali.it@localhost>]

Today I learned I wasn't getting the new pkgsrc-2012Q3 packages via the
'cvs update -dP' method described in TFM. How do I upgrade to the latest
stable verson using CVS?

I originally installed pkgsrc from a tarball. I'm no CVS expert (I use
SVN myself) but "/usr/pkgsrc/CVS/Tag" says "Tpkgsrc-2011Q4".

TIA!

-- 
> head -n1 /etc/*-{version,release} && uname -mprs
Slackware 12.1.0
Linux 2.6.24.5-smp i686 AMD Turion(tm) 64 Mobile Technology MK-36