Spectre RF Application note question

Hello, 

This is regarding the following application note which I found in the spectre RF workshop directory.

Spectre RF: PSTB Analysis Application Note from December 2013.

It does examples of RF simulation and mentions "to open a schematic for the oscillator_sckt in the library PSTB. Where is the library located at?

My Virtuoso version is:

Version IC6.1.8-64b.500.9

Spectre191

Thank you so much in advance.