Anyone experimented with Autogen XML codes?

I'm wondering if anyone has experimented with autogen XML codes to see if they can code XML objects based on country, state or cities instead of on region code?I'm hoping to be able to create autogen kangaroos that will show up in Australia and Central Australia but not NZ and the SW USA... Likewise Elephants that show up in SE Asia but not in the Carribbean...Right now the Autogen XML Coding is based on region codes, I'm wondering if there may be a country coding format that can be used instead, or if the Autogen XML coding is locked in to region codes only...I'm also curious if it might be possible to use Lat/Lon to assign autogen object categories specific to certain co-ordinates...