Snapped a shot of the bareknuckles in my S-series before I pulled them because position two (one over from full bridge) sounded fucking amazing. I didn't wire this up so I don't know what was going on.
BKP colour code is:
Far right set of contacts belong to the 'bridge' setting (I think - assuming the internals of the switch place them at opposite ends).
If anyone can shed some light onto this I'd be much obliged, as I'd love to replicate it in my 540PII. It's a standard import style 5-way switch.
IIRC, that position on Ibanez's is the two inner coils together.