Brian May pickups and wiring question(s)

[rockandroller]

If you want all four coils in parallel, its going to work fine and be simple to wire .
But yeah, having any of them in series will make it more complicated (maybe some 4P3T switches can achieve that?).

"Off" for either one of the series-wired humbuckers will kill both coils, right - unless you do some fancy trick where 'off' just grounds out the bottom of the first one in series...