yeah, with your amp on ( :lol: a while ago, when i was more of a noob, i was adjusting and wondering why it wasn't sounding any different and then i realised i had to be plugged into the amp! :lol: ), just adjust the screws to the side of the pickup, until the strings all sound as loud as each other.
and then do the same with the other pickup, first so it's the same volume as the other pickup, and then for the strings.
You'll probably have to go back and forth a little between pickups.