It has nothing to do with LIBSUFFIX residing in files being included.
It has to do with the fact the included files, the stuff {$I blah} is
enclosed between IFDEF and fact is the IDE deletes the IFDEFs (and I am
sure you know that very well).
I think I misunderstood you maybe, you were referring to actually
editing the file in the editor and I was actually saying you can not
use the package editor (or package manager, whatever is called).
I still say that what you do is risky and I would not advise people to
follow upon your idea, unless they clearly understand NOT to use the
package editor/manager from the moment they choose to put IFDEFs in the
DPK/DPR files. Actually that was my point all along.
Lucian