If you are talking about the hard disk drive aluminium/pull tab casing screws you will need a Torx screwdriver (in the shape of a six pointed star). I reckon most DIY shops will have them. I bought a set today to install a 320GB Hard Drive. I think the one that fits is T6 or T7.
Incidentally can Nov '07 Macbook support a 320GB Hard Drive? And I'm pretty sure the answer is no, but can you install a new hard drive with out the Leopard installation disks?
I'm in Malaysia and have taken advantage of Genuine brand cheaper Computer components but forgot to take my installation disk.
I've formatted the new drive correctly because I bought an external case for a 2"5 Hard Drive.