Yes, the .bas file in the PBP folder. ie. 16F877.BAS

And, just like you do with the Config lines in the .inc file.
You can comment out the PORTL/H and TRISL/H lines, which allows you to define them in your main program.

Then you can...
Code:
PORTL   VAR     PORTA
TRISL   VAR     TRISA
PORTH   VAR     PORTD
TRISH   VAR     TRISD
Which puts 0-7 on PORTA, and 8-15 on PORTD.

Or to whichever ports you wanted.