I just started with installing Blender 2.74 and Kormahn, and until now, it worked almost flawlessly.

You can find the tutorial how to install those two programs here:

Link to the guild of writer´s wiki

I won´t repeat the instructions here, because the tutorial is very easy to understand and well written.
The installation process is much easier and less tech-y than with PyPRP. A big thumbs up for that, dear developers!

I´d like to add something, though:
I have had an older version of Blender installed, so I had to do the thing with adding another subfolder with the name 2_74 to separate the two Blender versions.

When I then installed Kormahn (after having installed Blender 2.74), for a moment I didn´t understand, that in the folder I had created there was a new one, with the name “2.74”.
You have to select that one to install Kormahn there!
(This is explained in the tutorial, but I missed it.)

Another thing:
When the install script of Blender added a new shortcut to my desktop, it messed up the old one (to the old Blender version.)
Suddenly I only had the new one and had to recreate the old one.

Be sure to name the two shortcuts so you can easily identify, which is which!

Follow each and every step in the installation tutorial, then everything should go well and work fine!