Using Slim Internals to get A/v On Psp Fat?

I was thinking that Maybe you can use some Slim Parts to get the A/V Feature on the Psp fat it looks like the plug is the same you probably just have to do some soldering and change maybe a few internal parts.
I Havnt found many slim parts yet though. If I could fin info on how the A/v Setup works on the slim Im sure I could figure something out.

Or isnt there a way to tap the connection leading to to lcd and make some a/v ouputs on the fat? then just modify the case to plug in a 3.5mm jack/ av cable.
I dont know much about this stuff just some food for thought.