Yes, it is the wrong word.

You have one slot in your case, this is fine, you can get a DVD/CD Combo drive for that price.

http://www.amazon.co.uk/Fujitsu-DVD-...9192854&sr=1-2

15 pounds?

I'm more than happy to walk you through it when you get it, as others are I'm sure. Learning to build a computer yourself is a lot of fun. I did my first one in march, since then I've done 3 for work and one for myself. All work fine.