Removing installed packages

[Rem P Roberti]

In trying to upgrade CUPS on a new 7.2 installation (CUPS was installed
via sysinstall) the upgrade choked, and then I saw in UPDATING that
print/cups has been split into multiple ports, and that in order to
upgrade you must first remove the installed version.  What is the best
way to do that?  Should I be using pkg_delete and, if so, with what
switch or switches?

Thanks.

Rem