Given:
frame.inc // the main AUT frame
plus other .inc files:
frame1.inc
frame2.inc
"frame3.inc
d:\other incs\gui1.inc
d:\other incs\gui2.inc

In Options/Runtime... Use Files:, I've been using a .lib (such as frame.lib) instead of the frame.inc file and have not encountered any problem with it.
where:
frame.lib contains
use "frame1.inc"
use "frame2.inc"
use "frame3.inc"
use "d:\other incs\gui1.inc"
use "d:\other incs\gui2.inc"

I have not seen this documented anywhere lately. Any known problem/disadvantage of doing it this way?

Thanks!