Or you can buy a Super Switch and try every combination there is . . .
Takes time (some brains) and patience to figure out every way to wire it, but it's fun.
I have my RG 520 wired for;
Pos. 1; Bridge, full humbucker
Pos. 2; Bridge side coils both pups (nice twangy
strat sound)
Pos. 3; Bridge side coil on neck (true single coil, well, sort of)
Pos. 4; Neck side coils on both pups (nice twangy strat sound)
Pos. 5; Neck, full humbucker
I won't go into all the combinations I tried before I came to keep that one, too many to list (and some too STUPID to list . . . how about both humbuckers with all coils "out of phase???" YUCK! :-D)