I will just post it here!
Step 1: What We'll Need
-An Original N64
-Some tools to connect the n64 to the LCD screen
-A Case to put all these into ( or the original N64 Case glued together using modeling clay)
-A small speaker ( EDIT: It was an N64 Ram Upgrade about 512 MB , get it from amazon.com)
Step 2: The Setup
Then you'll notice two ports, 1 above and one below , the above one is for the cartridge , the below one is for the speaker.
Connect the cartridge, Screen , and Speaker.
Now we need three 4V batteries for the screen and the N64, connect them to the N64's Power Source , so that you can use the power supply as a charger.
Now we'll need a steel sheet so that we can put the circuit boards on them .
Put the LCD screen, then the Batteries , then put the N64's circuit board, then put the steel sheet , attach screws so you make sure they wont move away , Now , unfix the N64 Controller and put its circuit board on the steel sheet, put another steel sheet on them. Remember the Above port we say earlier? We must desolder its wires so we can attach it where ever we want . after desoldering , attach the Port on the 2nd steel sheet , and then solder the wires again! Now we can put the cartridge on the back on a lay-down form.
You can now attach rumble integration if you want.