How to add a folder to Left side of dock

I don't know if anyone has posted this, but here is how to add a folder to your dock on the left side of the divider.

When you click on the folder it opens the referenced folder, it does not behave like a folder would on the right side of the divider.

Select the folder you with to add
Control click on it and select get info
Add .app to the end of the folder name
Select add when the warning message comes up
Drag and drop the new "App" to the dock
Control click on the original folder and select get info
remove the .app from the folder name
And your done!