Installing a named IPS package in a zone

Let's say you have a package you'd like to install, but don't have a .pkg for it.... For example, gtar.

Go to http://pkg.opensolaris.org/dev/ and locate the package (search box)
For example, SUNWgtar@1.17,5.11-0.111:20090331T082820Z
Note the name before the @
IE, SUNWgtar

If this is the first time...
root@kallisti:/opt# pkg set-authority -O http://pkg.opensolaris.org/dev/ os-dev

Then to do the install...
root@kallisti:/opt# pkg refresh
root@kallisti:/opt# pkg install SUNWgtar