Simple import question

[Rei Roldan via Digitalmars-d-learn]

I don't see how passing all required files to the compiler could 
possible raise an issue with module discoverability. Unless I'm 
missing something? In regards to pains if "folder|file names / 
package|module names" don't match, imho, physical organization of 
files should never (ever) be of any concern to the compiler.