I am taking a course (a free one) to learn how to create music using a synthesizer. The course I am taking allows me to download FXpansion's Strobe 2 but it is only good for 90 days.  I'd like to find something that is packaged with SONAR Platinum that is similar in nature to Strobe 2.  I am trying to figure out if Dimension Pro 1.5 fills that bill but can't seem to find info on it much less figure out how to use it.  For example, how do I create audio files? I can't seem to insert  Dim Pro 1.5 as a synth as I can with Strobe 2.
 
What other synth's are the  that I might look into? 

I'm not sure what more we can do for you, sir. You got a number of helpful replies last week.
 
http://forum.cakewalk.com/Cakewalks-Forum-is-Without-Question-The-Best-m3563672.aspx
 
Here is a list of all the instruments that come with Sonar. If you hover over the names in the far left column, a little pop-up will tell you which one are synths.
 
http://www.cakewalk.com/Products/SONAR/Versions#start

Looking at Strobe 2 it seems more or less a "standard" polyphonic subtractive synth. Does Sonar still come with Pentagon? It should have everything you need. There's also the AAS analog synth and Z3ta+. They all cover the same parts - oscillators, filters, amplifier and modulation sources (envelope generators and LFOs).

FWIW, nearly all sample based synths (e.g. Dimension) are also based on subtractive synthesis. They just have a (multi)sample in place of the "analog" oscillator and they usually miss some more niche features like oscillator sync. So if that's what your course covers you have a good start.

What about Psyne II and Z3ta? Z3ta is good for more than just being a cool multieffects processor 

Thanks for all the help.  It is much appreciated.