We need a program which can generate virtual/fake visitors to a website.

The program should have following capabilities:

1. It needs to simulate that Visitor stays certain time on the site
2. The visitor needs to get logged by Javascript statistic software (i.e. pphlogger, Google Analytics)
it is very important that the visitors can be logged by google analytics
3. It needs to be capable of sending up to 250.000 visitors a day
4. IP spoofing should be applied to show origin (country) of visitor
5. Visitor Browser, OS, Screen resolution needs to be simulated
6. It should delete/terminate cookies/sessions after visit. (if a visitor comes from the same IP he needs to be counted again as new visitor.)
7. it should be a stand alone windows application
8. we want to enter the target url, and choose number of visitors we want to have and then hit a button!

The developer should be able to start on it immediately.