[ptx] Manual Override for Blend Lines?

[Chris Horn]

Hello.  I've been using Hugin lately and very much enjoying it (I tried a few 
other programs and they don't compare), but haven't been able to figure out 
how to manually specify where to place the blend line.

In past photos it didn't matter too much, but recently I have two component 
shots both with people in them (on the edge of the photo).  Being alive and 
all, they moved between shots.  I'd like to specify parts of the frame that 
need to be chosen for inclusion the final panorama (i.e. which photo stays 
"on top").  The ability to do this would allow me to keep the people in my 
picture looking normal - with just two legs instead of four.

Is this even remotely possible?

Thanks!
Chris.