Project suites, physical projects and "added as existing" projects

Hello,

I would really need an explanation about the projects that could be added "as existing items"...

Here how I'm organized : I have a single Project Suite that keeps about 8 or 10 Projects. It's my only "physical" ProjectSuite.

I do this because within the projects I share reusable scripts and sometimes the namemapping.

But... I need to dispatch projects into 3 project suites to make sure that I begin the 3 "runs" at about 8pm and end them before 8am.

So, I create 3 Projects Suites and I add "as existing items" about 2 or 3 project at each.

My question is : where do I need to check the test items ? Within each project suite I may not select all project items. But do I need to "make my selection" at the physical project AND the "alias" Project ?

Any help would be much appreciated... Thank you in advance.

Mehdi