upgrading to 3.3

[taproot420 <taproot420_(_at_)_myrealbox_(_dot_)_com>]

I am currently running 3.2 and would like to use cvs to upgrade to the 
3.3 release now in the cvs. Would the following be correct:

cd /usr
cvs checkout -P -rOPENBSD_3_3_BASE src

This is what i was told and i assume the "cvs checkout -P 
-rOPENBSD_3_3_BASE src" is correct but what about the cd /usr... should 
it not be cd/usr/src?  Do i delete my current /usr/src and then recreate 
an empty /usr/src or update on top of the 3.2 src?

I have only used cvs to update my src and sync with the patch branch for 
a particular release but have never used it to upgrade from one release 
to another so i would appreciate some guidance.

Thanks and have a great day.!