I was reading on this in several places but am confused about how to go about it in Sonar.
http://blog.reddogmusic.co.uk/2013/07/16/how-to-add-thump-to-a-kick/
The theory is a gated sine wave triggered from a control track as I understand.
Know of any videos? 

Do you have the pro channel gate?  If not, it's no big deal since i believe the Sonitus gate has sidechain. 

Yes I do thanks.
I've never done a gate to trigger a tracks wave.
It must be like a reverse ducking sidechain?
Instead of the signal dropping with the trigger, it plays right?
What wave has the gate?.

The gate goes on the sine track.  Create a send on the kick track and send it to the gate on the  sine track

Cool, thanks, That makes sense.
I placed the noise generator plug on an audio track and hit play but no noise.
How do you make it make its noise?

I usually use a  long midi note on a synth, but i'm guessing it should still work the same way wit ha generator.  adjust the threshold

Sorry, I'm not understanding the process/idea
Where do I put the plugin?

The tone generator that I use MOscillator (from the free MeldaProduction suite) would need the input echo on to hear it with the gate after it to hear the complete effect. It may be handy to tune the generator with the input echo on, previewing the effect with the gate; ultimately you will need to get the tone on the track. To do that, let the track record however long it needs to be. This will create a blank wave. Freeze the track to print the MOscillator. Enable the FX bin, disable the MOscillator. The gate should be enabled and working on the frozen track.

M_Glenn_M
Sorry, I'm not understanding the process/idea
Where do I put the plugin?

ARe you referring to the gate plugin or your generator?  If you are referring to the gate, you want that to be on the sound you wan t gated; the track with the sine .  Never tried it with a generator, so scooks advice is probably rock solid. I find it is easier to control  this sort of layering by generating a midi file that  mirrors my kick pattern and having it trigger a sine based  subbykick patch in a synth.  be very careful doing this kind of layering because if you don't have monitors that are capable of handling deep sub-bass, it may sound fine and the sound like a muddy mess when played on a system with deeper low end.  i did this while  mixing on some cans and found myself in the studio with a useless kick track

Did you get this working?  I looked ta the link you posted again and it is fairly easy to follow the instructions given there since the process is almost identical in Sonar.  I did have trouble getting it to work with the oscillator plugin, so I will try that again in case you need more help.  if you don't get this working, i can upload a project file showing an exact setup that works using nothing but internal X3 plugins and synths