Yep. I copy and paste them on to new layers in Gimp. I set up the empty transparent layer first.

By the way, I had my tablet out and I had a free minute so here:
Click image for larger version. 

Name:	TYMA-1-1b.jpg 
Views:	354 
Size:	2.61 MB 
ID:	7973

And here's the overlay layer for you:
Click image for larger version. 

Name:	Overlay.jpg 
Views:	164 
Size:	232.2 KB 
ID:	7974