Sidechaining / compressor sidechaining working ?

Could someone please do a video tutorial for Sidechaining in Sonar 2015 in general or compressor sidechaining in particular ?
The documentation isn't very good on this topic.
 
It is stated that a PC4K S-Type bus compressor is offered in ProChannel for Buses (Platinum only, but I have platinum), but it doesn't. I still get a PC76 U type compressor that doesn't support sidechaining.
 
On YouTube, I found a Cakewalk video from 2012, where you insert a PC4K Exp/ Gate in ProChannel but I don't have it either.
The only choices I have are: Breverb 2, Bark of Dog, Console Emulator Bus, Console Emulator Channel, Panipulator, Rematrix Solo, Saturation Knob, Tape Emulator, VKFX Delay and FX Chain.
 
 

I believe PC4K-S Compressor and Gate are not included in Platinum, and still have to be purchased separately...?
 
But the The old DirectX Sonitus compressor is sidechainable. Try that.

There is a knowledge base article about sidechaining using the Sonitus plug-ins https://www.cakewalk.com/Support/Knowledge-Base/2007013049/Sidechaining-in-SONAR. The mechanics of the process have not changed since the article was written.

You only need to use "Replace Module" if the PC76 is already in the ProChannel. As explained above, the PC76 and PC4K-S bus compressor are mutually exclusive. They are among the oldest PC modules and share a slot in the channel. The video does not make a big issue about it but does cover replacing the PC76 with the PC4k-S bus compressor. If the PC76 was not in the ProChannel both compressors would show in the module pick list. One of the first customization I did with the ProChannel was remove the compressors from the track and bus defaults.
 
The documentation is pretty clear which compressor to use. I believe the steps in the help do not take into account the PC76 could already be in the ProChannel and that the two compressors cannot co-exist in the same channel strip.