We get a lot of people coming to our All About Boats... So it goes sailing blog using various search terms regarding Apple Macintosh MacBook Hard Drive problems / failures.
We just read this posting in Boing Boing titled "How to Install a New Hard Drive in a MacBook". This post then refers to a TechBlog post. If he can do it and WE can do it, so can YOU!
iFixIt is an excellent resource for "how to's". This is where we found the info to replace our first hard drive... iFixIt.com They have lots of photos which is a big help!
If you are having computer problems, we feel for you!
All the best!