Load Kontakt 7 into your DAW.
Click on VIEW>Outputs.
Click the plus sign to configure.
In the dialog box enter 16 for Quantity, 2 for Channels, click Delete current Channels or configure as you wish and click OKAY. You can save this configuration by clicking the PRESET>SavePreset with a descriptive name.
Add 16 New Instruments by clicking FILE>New Instrument 16 times.
Change outputs of each new instrument to Match the MIDI Channel. ie., MID CH 4 = St. Channel 4.
Click FILE> Save Multi as Default.
Now you can drag up to 16 instruments from the browse into your Multi and the routing is ready to go.