Here are some screenshots:
First off I built 8 new keymaps in the general keymap group. Four were for left mouse (mouse1) and four were for right mouse (mouse2). Each four had a no mod, shift, ctrl and alt component, which corresponded to healbot actions (see below). The screenshot below is of the left mouse shift keymap. Notice the sync cursor as the first action...
I went all others as I have set it up for my priest to heal, my mage to decurse and my paladins to cleanse, only showing priests healbot screenshots below.
http://wow.jafula.com/images/extforums/isboxheal1.png
Then I build a new clickbar called healing. I made a 1x4 button grid. The first button was for no mod, second was shift, thrid ctrl and fourth alt.
This is the screenshot of the setup for the first (no mod) button.
http://wow.jafula.com/images/extforums/isboxheal2.png
This is the screenshot of the setup for the second (shift) button.
http://wow.jafula.com/images/extforums/isboxheal3.png
I have healbot running on all my characters (essential for my tank and priest). Tank so I can see the health of the toons and priest to do all the hard work (healing).
I moved the click bar over healbot on my tank. You can see the four click bars on top of healbot in the screen shot below. The left larger screen is my tanks and the right smaller screen is my priests.
When I left click in the first box over the Jaamia section, my priest casts penance on Jaamia. If I left click in the first box over Jaania, my priest casts penance on Jaania. If I right click on the first box over Jaamia, my priest casts Power Word: Shield on Jaamia. If I left click on the third box over Jaamia, my priest casts greater heal on Jaamia. You can see my priests healbot setup in the two screenshots below.
http://wow.jafula.com/images/extforums/isboxheal4.png
I set up my priest healbot left click to be as shown below:
http://wow.jafula.com/images/extforums/isboxheal5.png
I set up my priest healbot right click to be as shown below:
http://wow.jafula.com/images/extforums/isboxheal6.png
This is the reason I moved from HotKeyNet to ISBoxer. Just brilliant.