/g/ is fail

I was looking into modding my psp, and custom firmware's caught my attention. Now, I know building one from scratch is out of the question for a newb, but I wouldn't mind taking a gander and altering to some extent. I have some questions tho...

1) Wikipedia states the PSP(amongst various other consoles) uses a system based on the old RISC computers. Does this mean i can use mips assembly programming for RISC comps? Is that the language these firmware are written in, or...?

2) What hardware/software would i need to import/export the firmware from/to my PSP, and then read/edit? Can I use the handily built-in USB port, or do have to do some soldering/general arsing about?

3) Is there any resources or documents detailing these processes,Information found/discovered, or common hacks used?

I KNOW dark Alex had already made some, but I'd like to take a shot at it.....

tl;dr - how do i programmed PSP?

>>1
1. RISC != MIPS

Also, there's Lua and Python to work with, no need to deal with assembly unless you need more performance.

2. Yes, transfer executables to the GAME directory or something like that.

3. Get Dark Alex' firmaware, Google.