I will make a picture... I have:

PSN 1 > SE 1 > Account 1

I want to know that with this add on can I make:

PSN 2 > SE 1 > Account 2

Then swap them:

PSN 2 > SE 1 > Account 1

PSN 1 > SE 1 > Account 2

So I can still play with my game, even though they have to use mine to access all my add ons and games I bought. Cause honestly, I just want to know what that add on is for... and why the heck was it made for...