a reference to a list item into a folder

Hi all,

I need to have a reference to a list item into a list folder.

This is the scenario:

I create a list item "item1" into a folder "folder1".

Now I create "folder2", and I just want to put a reference to "item1"
into the new folder.

In this way, if I change the content of "item1", I can see changes
from "folder2". And also, iterating through "folder2" items, I can
retrieve "item1".

Is it possible?

Thanks