Ok I know I said that the DIY will come like 2 or 3 weeks ago, but I got busy and had no access to a camera, but now I do so here it is.
Things you will need.
Python alarm remote shown on the first page and the Nisan flip key which I got from ebay link below. It takes about 3 weeks to get it.
Plastic Repair Epoxy
Plastic Cement glue
Small philips screw driver
Drill bits- 5/16, 7/32, 3/32
Sand Paper 80-150 grit if you are painting with plasticote pictured above, otherwise you need 320 grit for primer and 400 for paint.
Here is the picture of the supplies
Ok here it goes.
First you need to take apart the Nissan keyfob and the Python key fob. For the Nissan key you just undo the screws on the back and for the Python you have to pry it open.
Once you get your key fobs apart you can start on either of the key fobs faces.
I would start with the Nissan personally. You will need to cut out the buttons using the top button as the reference meaning leave the top of the button alone and just trim all of the buttons toward the bottom like pictured below with the green line.
When removing the plastic off of the Nissan key fob, make sure to leave about a mm or two on the edges of the vertical green lines shown bellow so that your Python face does not slide through. The picture below also show the approximate size of the Python face being inside the Nissan face.
You can now start on the Python face and trim it. In the pictures below the green lines show the approximate trimming you need to do. One thing to note is that when you trim the Python face you need to trim it so that its size is maximum size allowed to fit inside the Nissan face. The bottom picture shows the sides of the face that you need to shave down in order to fit it between the sides of the Nissan key fob.
Once the two faces fit together, you need to glue them together using the plastic cement pictured in the supplies. While you let it dry you can work on the back. What you need to do there is trim the upper arc a little bellow the sides, you will probably need the circuit boar in the face and then fit it to see how much you need to trim. The foam round part that came with the Nissan key fob will need to be relocated bellow and the lower arc around the battery will need to be removed like shown in the picture below.
Once the glue dries, you need to epoxy the front of the face. You will have something like shown below in green and you need to put plastic epoxy around the edges which is the red in the picture. Once the epoxy hardens a little, take a razor blade and start trimming the access epoxy around everything. Once the epoxy completely dries you need to sand it smooth with 150 or lower grit if using plasticote paint. Once that is done you need to open the hole for the led light. To do this take the 3/32 drill bit and drill straight through, then step up the other drill bits using your fingers and kind of round off the area so its kind of smooth and sand around it to make i even more smoother. Also the second picture is showing the final product with the epoxy sanded.
Once you are done with the retrofitting you are ready to paint it.
For the metal key just cut and trim it to the Nissan key spec and insert it. I dont know how this would work for the chip key people though.