Spanki created a free program called STOMP that fixed obj files.  The links that I have are dead, but you can send him a message and see if he has it linked somewhere.

 

http://www.renderosity.com/homepage.php?page=5&userid=43109

Here is what it is and how it works.  I'm really stupid when it comes to programs, and that UV Mapper is beyond me.  This program is simply import and export, nothing else involved. It does the work for you:

1. Save a copy of your .obj file in another directory.
2. Open Stomp
3. Open the .obj file in your geometries folder
4. Save it back out into the same folder, using the same name.

Here is the picture of the settings you save with.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi