Essencay - cool, I knew what I said worked as I've done it 3 times with my own skins now, and 2 or three times "fixing" others that I wanted to use - but the problem is if the design doesn't work well when rolled up that big, as you often can't make the rolled up state as compressed if you have to leave the bottom/top frame re-size margins visible....what would be cool is either a) this quirk is fixed in WB (though it's been there for ages),

a separate "rolled up" image is allowed for the left/right frames.
I actually prefer the 2nd option in a way as that way you could design things to look different rolled up, and that could open up new possibilities
...though, the glitch ought to be addressed anyhow. In the mean time, I'm sticking with window frames designed to be rolled up without the glitch to avoid all the complicated extra button malarky