Here I am going to provide my analysis of the opening. I have developed most of these ideas from scratch and the few games that are in the game explorer along with the help of Fritz. I hope this may help those of you in the tournament or anyone with an interest in this opening. Of course I am no means an expert in this opening or any for that matter, so if there is an error of you think my ideas could be revised or completely changed please dont hesitate to correct me.
The move that I advocate is 5...d6. It allows black to stick to his queenside development. This is an article on this site that may be helpful for those who want to look deeper into this opening - http://www.chess.com/article/view/openings-for-tactical-players-the-danish-gambit
I no there are alot of variation which is a result of the tactical nature of the postion and there is definatly no need to look through them all, but it is nice to have a general guideline for the opening. Sadly there are always ways for white to prevent black from castling, but the position is holdable for black as long as black can deal with the pressure. I can also provide my analysis for 5...Bb4+ if people want and why that is a bad move but hope the above will help you out.
For some reason the first diagram is not working and it had some ideas in it. If any needs clearing up for stragetical ideas just ask and I will answer, but right now it is getting kind of late and I dont have time to spend remaking that whole diagram.