Thanks for the guide! You've saved me from unscrewing many unnecessary screws and allowed me to perform this repair without damaging anything (except the brittle old felt tape, no way was that coming off, I used black photographers tape as a replacement). My 4 year old MB was making horrible noises, overheating and was almost unusable. I found an inexpensive fan on eBay ($13), and in less than half an hour it is running like new. I don't know what the quality is like compared to a part ordered from Apple, (only time will tell) but for now it is working great.