We're using airy Hammond(DP) which is ok, but a little too roller rink.....
 
Whatcha got?

In RPro in the Dimension Pro Factory Library try the virtual B3. They are in the Organs and all the programs start with "RCG VB3." Here is an image which documents how to use the programs http://forum.cakewalk.com/FindPost/2878220 when loading them in DPro.
 
If you have a little extra cash, http://www.genuinesoundware.com/?a=showproduct&b=24 is a tough plug-in to beat for B3 sounds.

Add some distortion via the Sonar bundled softube plug or the overdrive of choice. I add something to every organ patch that doesn't has distortion as an option.

I use the Jimmy patch in Rap Organs.  I believe that is the right place.

The VB3 plugin is killer!
 
I'll give the Jimmy patch a shot later when I can turn it up a bit.... 
 
Here's a few I found in the DP lib
RGC VB3
               101
               Black
               Click
               Da Club
               Harsh
 
Here is my ref track for B3. I love this tone and how it fits with the harmonica.... It is Little Mike & The Tornadoes
 
https://soundcloud.com/ch...be-lying-with-you-than

If you want to fully utilize the RCG VB3 patches, consider loading them in Dimension Pro instead of Rapture Pro. I am not sure the controls shown in the image I linked above work in Rapture Pro. In Dpro, the programs are in Expansion Pack 1 > Organs > Virtual B3. They are the same programs included with Rapture Pro but the programs work correctly in DPro with control over the draw bars, leslie and keyboard sound.
 
 

OH! Lemme check it out.......

I found B3 16&1 Drawbars in mine that sounds good.  It is from the Expansion pack - Songwriter's collection. It contains about 5 different B3's

Has anyone tried this?
https://shop.cakewalk.com/1244/catalog/product.152042/language.en/currency.USD/?id=6wWys3IgvT