Hi, I'm planning to get a new motherboard: http://www.newegg.com/Product/Product.asp?Item=N82E16813131573 Questions: 1. Will it fit in my Dell Dimension 2400? 2. What steps do I have to do to remove all my stuff( processor, sound card, HD, etc.) safely. 3. Will my HD be erased? 4. PSU connections, etc. This would be my first time removing and changing a mobo, so I have not the slightest clue to go about doing it. Thank you very much, and Happy Holidays.