valledor03 hit every point, so I'll just say welcome to psp mod
EDIT: for the clear umd door ( which is called hard modding- when you mod the physical components of the psp), you should look at acidmods.com. They are pros with hard mods. I'm only good with software mods which obviously mod the software of the psp :P.
DOUBLE EDIT: here are some hard mod tutorials.
http://www.acidmods.com/forum/index.php?board=277.0 I'm sure that you can find a umd door mod somewhere on the site because I have, but I don't have time right not to find the exact link.