I'm assuming that for the FIRST song you play (of the medley) you already have a registration, either for the style, or for the song..... Then, during the song (or at the end!) you select another style to go and segue to the next.

Now, if what you select doesn't work, you re-hit the registration button, and the first style (attached to the registration) reloads. You then search for another style. As I said, this only works on two styles at a time, but it DOES work....

I guess, for gigging, I tend to make sure all the styles I tend to use all sit in the same area of memory, so I don't have to push a lot of buttons to get around. My method is to use the Internal memory ONLY for stuff I use on the gig. All other styles and songs I am either trying out or tweaking but not finished, they stay on a card, until they are gig-ready, THEN get transfered to internal...