I'm guessing it went something like this
Billy: Looks like you dropped this.. Adore, tablature book? Wow.
Jeff: Billy? Billy Corgan?
Billy: Yes, that's me. And you must be.. Related to James Iha, maybe?
Jeff: I'm Jeff. I'll be your anything.
Billy: Let's go James Iha 0.5. I have a shitty album I need to play live.
And the rest is history.