The precise instructions are included in the README file of the very zip you downloaded.
Thanks for your reply, Zear. I have read that document - it might just be that I don't have the IT knowledge to follow the instructions.
For example, at point 3 it says 'and when you're asked for a driver location use the directory there you unpacked the dual boot files...' What does that mean? Have I got to unzip all the files that are in the zip file and put them in to a folder?
At point 5 it says 'Open a command shell (Start --> Run --> "cmd"), change to the directory where you unpacked the dual boot files and execute the following commands...' I don't know what a command shell is or how to do it!
Sorry if my lack of what must seem like the basics to you is a nuisance. Any help is appreciated. I wish there was youtube guide for Vista so I could just copy it like a robot!