How to divide a Delphi project into BPLs properly?

Question

The company I work for develops a system in Delphi, that contains dozens of exe modules, and each of them is identical to a certain degree if it comes to source code. Sadly,

Answer 1

Why can't I browse my source code? Is there a way to fix this?

You can not browse the source code of the units included in the packages because they are neither in your project, your library or search path.

The way I solve this is adding the directories to the project search path. This way the compiler does not know about those files (and does not try to recompile them) but the IDE let's you browse their content and debug into them.