> I understand that only the
> owner can access the database, but is there a way to
> create a database from the downloaded pages? 
Parse the pages and extract what you want.

> The reason is that i can see a site that has a
> design almost exactly the same as i want for mine,
> and to save time, i thought it might be possible to
> download a site, and make modifications to my
> requirements.
This is the opposite of extracting the variable data. You need to replace the
variable data with placeholders and convert the html to server side script
(php etc)