Sorry for my poor English.
below is some picture of this mod.

1:cutted the N64 motherboard:



2:cartridge connect:






3:12V to 3.3V DCDC convert



4:heatsink copper


5:heatsink fan



6:ananlog stick:





7:Z button


8：3W Stereo Amplifier



9：JUMPPAK



some finished picture:

A：:starfox:



B：:The legend of Zelda



C:back of the N64 portable

Cool.

I actually have one sitting here as well. Never put ti all the way together to show off because I didn't totally like the way it looked.