The hub adapter takes some modification. You will obviously lose your cruise control, but that's totally not a big deal. On the stalk control, you will have to dremel down that plastic stem. On mine there were three terminals, two are for the cruise control, and the third is for the horn. Make sure to confirm the horn terminal using an OHm meter
When trimming that plastic stem, make sure to retain the terminal for the horn. It's easy to get overzealous and trim down that entire piece :biglaugh: Here is a picture of what I mean
See that wire coming out of the terminal, that's for the horn. It has a lead wire of green w/a red stripe (for mine anyway, like a said, make sure to confirm with a multimeter). Once that stem is removed, the hub will sit flush. You then wire your horn button to that wire.
Hope that helps some!