Just a little hint for you all...
Don't do this UNTILL you have vB installed and Working.
Here's my Directory Structure
# 127.0.0.1
|-- www
|----root
|------vbulletin1
|------vbulletin2
|------vbulletin3
|------vbulletin4
Thats on my local machine. I messed up installs 2 & 3 so i deleted all the files, unzipped and copied over again.
Ran the install and got GOBBLE! Then I realised. Just a reminder