The newer version using Kontakt 2 player will allow 16 instruments in an instance. If you use as a plugin inside a sequencer or notation program, then you can load multiple instances with 16 instruments in each. Memory usually becomes the limiting factor as you add more instances and instruments.
Hi, You can go to www.nativeinstruments.com and register and download the updates you will need for GPO and for the GPO KontaktPlayer2. You will need to install the NI Service Center and update it to the latest version as well. It will assist you in activating any NI programs you have. I believe you will need to download and install three updates:
Garritan Personal Orchestra Kontakt Player Update 184.108.40.206 library update included
Garritan Personal Orchestra Kontakt Player 2.2.3 Update
Kontakt Player 2.2.4 Update
They are all available at NI in both Windows and Mac formats.
Garritan and team are working on GPO4 which will use the Aria interface instead of the KontaktPlayer. It will be available "when it is ready" but is in beta currently. So if you want to wait you could upgrade to GPO4 soon and bypass the NI Kontakt Player updating scenario entirely. The Aria player will hold 16 instruments.