ASAP! Help, mmf disaster, (long)

Oh, my goodness! I have 3 hours to try to fix this. Two days ago I made a batch of mmf, successfully colored it black and wrapped it up to use today to cover a sculpted locomotive cake for my G.Daughter's party. While I usually use mff, which I love, my family isn't fond of fondant. So I thought I would try what everybody swears by: mmf. It seemed of good consistency, (I used the recipe with glycerine and corn syrup) so I felt quite confident it would be OK. (Maybe even good.)

Well, while kneading on a Crisco covered counter, it seemed too dry and was cracking. I kneaded in a little water. That made it somewhat better, or at least enough so I figured I would try. I rolled it out on a greased fondant mat and flipped it onto the cake. (I might add that the cake was prepared with a ganache base and to assure contact, I covered it with warmed piping gel.) While this has been good in the past, today it was a disaster. The fondant cracked all over and for a minute I tried to pinch and patch. I ended up scraping it off, (wouldn't you know it---it stuck TOO well and I just now finished.)

The ganache is a mess which I tried to repair with additional and smoothing with a hot knife. Now, after all this explanation (sorry for the length...I am unwinding as I type) I have a question: I have a small amount of black Satin Ice on hand. It is too small an amount to use here, but is it possible to knead it in with the reclaimed fondant, (plus a little piping gel) and maybe, just maybe recover?

I am just so glad that this isn't for a paying client but I don't want to do any less for family.
Thank you for whatever advice you can give me!

The piping gel is unavoidable as it is what has so tightly adhered to the pulled off fondant. I might even have a bonus of a few cake crumbs. This is that much of a disaster. At any rate, I'm going to give it a try with mixing both and adding a little buttercream. So what is there to lose? Thanks.
(I guess this isn't the worst disaster I've had. I once shared a "dropped on the sidewalk" cake with friends. We just got our forks and ate the top part!)

Thanks for your help in my time of desperation. I wasn't able to reclaim the fondant, even with your suggestions. I really think I will be sticking with MFF here on out. The second application failed almost as miserably as the first, even with nuking, kneading, "BCing" and adding in Satin Ice. I just ended up wasting expensive Satin Ice.
This definitely was not a cake for the portfolio as it ended up with bumpy ganache and no locomotive detail I had planned on. The only positive thing was a lesson learned and wait...it did taste delicious. With family happy, that was sufficient. Thanks.