logic 9 reinstall due to missing sounds

one year ago I moved to mac, and since I was first undecided between Logic and Pro Tools.

so I just downloaded the both of them to try them.

As soon as I decided to stay on Logic, I bought it...but when I reinstalled it,

I got an error and the installation didn't complete.

So basically I had the same Logic as before though with my legally obtained serial.

Right now, I'd like to make the complete install cause I need some sounds that right now are missing!

so basically I have to reinstall it all with all the dvds.

wich steps should I follow?

thanks!