Need a Script to test my servers load capacity.

We are looking for someone who can provide us with a script that will send millions of fake users to our own website all at once to see at what point our server will crash. The script MUST be 100% safe, and must be easily removed and turned off. I just need something that will send itself millions of users to itself. We will monitor our servers load, and monitor our servers ping time to determine what load our server can handle before it crashes. We need the script ASAP, so if you already have a script ready to go, please note that in your bid. You must have a way of accepting credit cards for us to pay you. NO PayPal please. --If you have the full I-Faker script, or the Webserver Stress Tool sold by Paessler please let us know if you can send us a working copy with serial---