If I were you, I'd start by doing a straight swap with the existing wiring/pots, then worry about fitting the coil splitting later.
It was an SG right? If so, then it's one of the easiest guitars of all to wire up.
Bascially (assuming you for 4-conductor), the red wire goes on the same terminal of whichever volume pot you removed the Gibson pickup from.
The black & bare wires you solder to the back of one of the pots (each pot will already be grounded)
In other words, simply detach two connections from each of the existing Gibson pickups & replace with the corresponding BKP wires :)
When you eventually get the push/pull pots, you wire them into the tone controls, then uncover the white & green wires from the BKP (they usually come already solderde/taped together) & solder them to onen of the terminals little circuit board looking bit on the bottom of the push/pull pot).