As promised here is my little tutorial on how I mounted my license plate.
I own a 2006 ZX6R (636).
I've never really done this, so I will do the best I can and if you have any questions, feel free to ask here or send a PM.
Items Bought:
Corner Brackets from Home Depot $2.69
License Plate Mount from Auto Zone $10

Sorry I don't have the original packaging for the license plate mount. It comes with most of the screws and nuts you will need to use, so there is no need to buy more.
Tools:
Philips head screw driver
Hex wrench
7/16 wrench

The nuts and bolts you see came from the license plate mount.
First disassemble the license plate mount by removing all screws and nuts.
Mount the corner brackets to the two screws located under the seat.
You can go about this two different ways.
-Remove the nuts that are on the bike and use them to mount the corner brackets
-Leave the nuts on and use the thread that's available. There is plenty of thread for this.
I started to remove the nuts on the bike and started stripping the nut. At this point I decided it would be better to just leave it on for fear that I would strip it completely. As most of you know the bolts on these bikes are tight as hell and once stripped you'd probably have to take it to a mechanic to remove.
If you take the route that I took, I would take care in how much you tighten. If over tighten, you may never get the original nut off.
Next mount the license plate mount to the corner brackets using the screws from the original packaging.
Be sure to keep it centered.
Last, mount the license plate to the frame created. I used the hex screws for this, but will eventually buy some led screws so I will be obeying the law. For now, I'm not riding at night, so I would say that there is really no need for it right now.
I'll post a tutorial on that also. I'm sure there are people who have no idea where to connect those wires, how to splice, or if there is a need to splice. Then again, maybe I am the only one.
I hope this helps any poor soul like myself who had no idea where to mount or what to use.
Thanks for reading.