how to use fp file in my project

I have used ini and toolbar functions in my project, these functions are included in inifile.fp and toolbar.fp. Recently I found my released .exe routine userly got run-time error. And I changed CVI compiling environment as below:

1. add these two fp files in the customize library, and do not include them in my project tree;

2. do not include fp files in customize library, and add them in my project tree directly, CVI will load related instruments automaticly.

Does these two settings has any different? Which setting is better?

Thanks!