Are you sure?

I suppose it's a good idea. Would take a bit more effort than the options I've done. I'd put it in if someone figured out the code - otherwise postponed until I decide to do some serious work on this module.

I had a brief look at this, and there a number of challenges which need to be addressed regarding how to implement this. I don't really know what you want, but basically it's a bit too hard for me to figure out, and I might have to give it a miss. There are already ways to screw with form submissions, and this one frankly requires a bit too much effort :P You would have to create a new 'in between' form during the validation, but store their submitted form values in hidden fields or store them for programmatic submission. I'm not even sure about that.
If you figure it out, I'll be happy to add it in, but it's not an important enough feature for me to spend a lot of time on.