Pretty sure this will get the job done. I hope I drew it up clear enough. I don't know what kind of horrible popping noises may occur with this setup, though. I imagine it wouldn't be any worse than with TBP, but I've never wired this up.
EDIT::: Crap, just reread the OP and this isn't what you want. What you want can be done, but I don't have time now to fix this. Mrphencrunk. >(