Guitar pickup change help?

I have one of those new epiphone wilshire limited edition guitars and I'm looking to change the pickups. Prior to this, I've had a shop always change pickups for me, but I'm gonna start trying myself. If I switch out the stock for a couple of burstbuckers, do I NEED to change like the capacitor or the potentiometers or anything else? If I do tell me how to figure out how to determine what to use?