Hiya.

Am I understanding correctly that you are saying you have already "UV Mapped" an object, then did some more modeling on it, and now your UV map is "all scewed up", and you want to 'fix' this?

From the sound of it, MED doesn't handle "re-UVing" very well, so....don't use MED. I use a program called "Ultimate Unwrap 3D" ( http://www.unwrap3d.com/ ). It will set you back $50, but in all honesty, it's worth three times that. I recently was board, so I made about a half-dozen low-poly "fantasy-ish items" (go see the User Contributions forum). The UV'ing of those items took maybe a grand total of 4 hours. The great thing about UU3D is that it allows you to "re-do" UVing of all or some of the polygons on your model. So, if you UV map an entire humanoid robot, then make some modeling changes to his right arm, you can go back into UV3D and simply re-UV just his right arm.

Try the UU3D demo and see for yourself.