How do I replace the hard drive on an old iBook?

I (or rather, Caroline) has an old iBook, the white dual USB model, but her hard drive is about to give up.

What does it take to replace the drive – apart from that little screw driver, which I don’t have yet.

Will any normal 2.5” drive, like a 40Gb Seagate model ST94011A, that I have lying around, work with it? Can I just swap it out, then have the OS X installer reformat it (it has a Red Hat Linux installation on it currently).

I found this, which seems to suggest that you have to be a little careful, but he’s referring to another model.

Thanks for your help :)

Update: After borrowing tools from my neighbor and two trips to the hardware store for more, the operation is now complete, thanks to the detailed PDF linked to in the comments to this post. The old iBook now has a 40Gb drive, Panther, and it’s running Software Update right now, so I can get iTunes with AirTunes :)