@Dmitriy - Here's the steps:
1. You create your first regular campaign, say Campaign A, and you do all the steps you have to do, but you don't send it just yet, let it in draft.
2. You create another campaign, an autoresponder, say Campaign B, and you select "after-campaign-open" as event, and from the campaigns drodpwn, you select Campaign A. Now that everything is done, you start the autoresponder, that is Campaign B.
3. Campaign A is still a draft. So you start Campaign A as well.
4. That's it.