This is my first mod ever on my PSP-1000 besides a case swap.
I took the analog sticks from an old PS2 controller and soldered those to Mini USB connectors.
The left was kept analog because the female USB port is soldered directly to the motherboard along with the left analog nub.
The right was converted to digital and is soldered to the powerboard. Overall it took me about 15 hours total to complete.
I learned everything I needed to know in order to complete it right from this website, so thanks a bunch.
Hope you guys like it.
Here's some pictures and a video.
PSP MOD PS2 Dual Analogs