This instructable will detail another method to modify your Cuisinart SupremeGrind for espresso. This is an alternative method to the one provided by 'sehrgut' entitled 'Hacking the Cuisineart SupremeGrind for Espresso'. I highly recommend reading that instructable as this one will be only supplementary.
Firstly, I'd like to say that while this method will allow the machine to create a finer grind, in the process, we will remove the safety systems that protect the grinder from damaging itself. Modifying the grinder in this way can damage your grinder and will likely void the warranty (if there is one). After completing this modification, be well aware of the distance between the burrs before you start grinding.
My current opinion is that the even after completing this procedure, this grinder is not capable of producing a good espresso grind. However, it will produce a grind much finer than what it is natively capable of.
This method uses two step approach. In the first step we remove the physical barrier preventing the hopper to turn past the finest grind level. In the second step, we disable the electronic control that stops the grinder from turning on when the bean hopper is turned past the finest grind level.
Step 1: Cut the Plastic Tabs
First, we need to remove the plastic tabs that stop the hopper from turning past the finest grind setting. Empty the beans from the hopper, unscrew the hopper, and separate it from the rest of the machine. You'll see two protruding plastic tabs on the top of the machine that are separated by the circumferential groove. Removing these tabs will allow the hopper to turn past the furthest grind level. I used a pair of wire cutters which worked well. These pictures show these tabs already removed, but hopefully you can see where they used to be.