What is PrjStd.WW directory used for?

Hey All,

I am trying to package up and prepare a microsoft project 2010 professional install using SCCM.

So far I have managed to create something that installs a standard version and now I would like to make sure it always installs as professional.

I have been hunting through the various folders looking for a pro install, so far, nothing seems obvious.

What does PrjStd.WW used for and how do I go about making my package a project professional install?

Thanks in advance,