In some cases we would like to use the fonts we installed for photoshop for photoshop purposes only and we don’t want it to load in other applications.

In order to do that install your photoshop fonts in this location:
C:\Program Files\Common Files\Adobe\Fonts

And there you go, no need to worry seeing them anywhere else.

Oh btw, I heard that if you got hundreds of these fonts installed on that location C:\Program Files\Common Files\Adobe\Fonts it will take time for your photoshop to load, anyway I haven’t tried it yet , so I can’t really verify .

Or accdg to some source you can also install it here: control panel => fonts or  c:\windows\fonts

Well I haven’t checked the difference between the two locations w/ regards to photoshop performance. It’s up to you to find out and tell me