#2
Yes, 4 conductor just means that it can be wired for coil-splitting. When not coil splitting, two of the wires get soldered together, the manual should tell you which ones, if not google wiring diagrams for starts with humbuckers.
#3
Ok I understand now. Thanks man. I was thinking about upgrading to a new guitar better suited to the music i want to play but if i can upgrade to different pickups for less than $50 i might as well give that a shot first before spending $400 on a new guitar.