This is my scenario:
I have one Web application with 2 site collections.
Then I have 2 lists ('list1' and 'list2' are in different site collections). The two lists however are identical (with the same columns, not data).
I have an Event Receiver which fires when an item in 'list1' is being updated.
What is the easiest way to add this exact Event receiver to 'list2', so that it fires when an item from 'list2' is updated as well?