I read the chip spec, but I did not find any PWM timer settings associate with the 16 additional Digital outs. I am going to add them after the analog outs for the moment, but I will entertain arguments that they should precede them. This way a code for a arduino mega will be compatable at the bit lvl with this change.
When I get a free moment or two I will test the changes, unless someone shows up with a problem or issue before I get to it. If someone wants to help test it send me a note on the bbs and i will forward the file.