multiple wp instances

Here is the deal. I custom coded a php server based mastercp application that manages all my sites/clouds. I am thinking about selling it to the public now. Here is the process/what it does. You setup a hosting acount (anywhere, godaddy, your server etc) Create a database on that...

I have installed WP2.5 and am running a blog. Now I need to create a different blog. How do I go about doing it? Apologies - this is a WP-NOOB Q, but would appreciate any pointers.