Agentcalm
Dang...might need to try the install again. I dont see anything for instruments under the Soft synth menu . dont even see anything in the plug in manager console.
That shouldn't be necessary. I think they're in there somewhere. Trying bringing up your Browser in Sonar by pressing "B" to toggle it on/off. Make sure you're on your instruments tab where you can see your other instruments. There's a search box up top. Try searching for "drums."
I don't have a Sonar installation to reference so I'm working from memory. You should also have SI Bass, SI Strings, and SI Piano (EP).