Ok, I organized all of the things we are doing. We can definitely cut back on things. I will have to discuss with you guys about flight plans. I would like to book SOME flights in advance. At least the one from London to Cork. Also, it would be cool to take a Panorama tour of London. That way we will cover ALL the attractions in a matter of 2 hours and can pick some to go inside -- most are not all that exciting to see the inside of.
Your trip is action-packed. I've been to most of the cities that you've mentioned and would stay longer in Paris and Rome if you get a chance. I would also recommend you keep a journal with notes about where you've been because it'll all just jumbled together after you come back. You also planned on going to the Vatican, but beware of the long lines (see if you can get tickets ahead of time) and remember to wear something to cover your shoulders and knees. Most of the churches in Europe seem to have that dress code. I also wasn't allowed in with a backpack because of security precautions so might want to be light on your feet if you can. Just some friendly advice. Good luck on your trip. Cheers!