The mod you are talking about is not a Strat mod. It's an Ibanez mod for tri-sound.
Maybe you missed my thread a week back on just having this done. And I use a pair of PGs! Don't worry, though, it's not technical.
The mod requires 2 3-way on-on-on switches:
Up = series
Mid = single
Down = parallel
Then say convert your tone pot to a push pull to set the neck and bridge out of phase.
To help wrap your mind around it... A humbucker is a dual coil pickup:
Series runs one coil into the other (high output)
Single shorts one of the coils (low output)
Parallel merges the two coils (med-high output)
Out of phase neck and bridge uses the single of each out of phase (lowest output)
This thread should help you out....http://www.ibanezcollectors.com/discus/ ... 1127747524