I don't : I do it with 3 differants zones and 2 
differant way of shipping and that work fine.
Even if I had to list the prices for 8 zones 
instead of 3, a cut and copy doesn't take more 
time then clicking on CTRL+C and CTRL+V...

Naturlay, you don't have to. It just a question if 
you want to have this kind of problems or not...

Cheers,
Yann Stettler