WordPress is famous for it’s 5-minute installation, which is awesome and all. Yet, if there’s a better tool, why not just use it? EasyWP is a PHP script that will install you a clean WordPress installation under 30 seconds, provided you give it the usual requirements (write access, mostly). Good if you don’t have Fantastico, for instance, or as the author mention it:
Also, this script is especially helpful in cases where you have to clean an infected installation (which I plan on blogging about shortly).