This is actually really easy to do, but I see far too many people do a lot of damage to their cases trying to remove rivets
First, use a dremel to cut the rivet so that it looks like a flat head screw. This is an old case. You can be a little more careful here.
Then use a flat head screwdriver to turn it slightly in both directions
It will easily break into two pieces
One or both of the pieces may still be attached slightly, so pull them off with pliers
I then use a Scratch Awl to push the little anchor piece through
And that's it! The whole process usually takes me about 30 seconds