Crossroady, you're very welcome, and also welcome back any time. We can get a full fledged assembly line going and make the last 10 boards!
I sent you a spreadsheet that matches port designations to arduino "digital pins." You do not need to modify the avr-developer cores, they work out of the box, including the pins files. Because the DIP package has different pin out than the SMT package we used on my board, you can't use my spreadsheet to map the physical pin number directly to the digital pin. But you can use it to map port to digital pin number.
If you need me to, I'll add another column for DIP physical pin number. but I expect you are ontop of that.
The data iin that spreadsheet is all tested. I also used that to add 1284 support to the NewSoftSerial library.