Keep the green and white together as they are one hot and one cold from each coil that puts them in series! disconnect the green and they wont work! if the Abraxas have a large offset between the coil windings you will experience some noise, I no longer have my Abraxas and can't remember what mine were like for noise, regarding your sound (tone) problems PRS pickups are not scatterwound (from memory) so the BKPs are always going to sound more open than the machine wound pups! some like it this way some don't, it is different and can take some time to adjust to this 'new' sound, I'm not a fan of A4 magnets for high gain I think that AV covers it better cutting though the mix etc! these are only my views as many like them! the change that you have made in pups will really show when you do a live gig, you will know if your happy with your sound then, if not change back to the PRS pups, I still use SDs as well as BKPs and like them both, they are very different.