I thought it did that, Ken, but I couldn't get it to do it last night. I ended up writing it off as remembering how K3ccdtools works, and took a series of stills instead.
I was quite sure it wasn't working, because live view behaves right, and updates after each exposure, but when I chose capture, the image dimmed, and the frame count was ticking up at the right rate for 3.75 frames per second.
Couldn't get it to do any different...
Al.