We constantly use the shipping override template because we find that the shipping weight for most products is not correct on Amazon and so our pre-configured shipping rates do not work. I can list a 4 oz item to Amazon but someone may have previously listed it as a 4 pound item.
We only sell domestically so we use the following zones
Std US Prot Street Addr
Std US Prot PO Box
Std Cont US Street Addr
Std Cont US PO Box
Std Alaska Hawaii PO Box
Std Alaska Hawaii Street Addr
If their is a work around, I would be interested to hear it.