Proxy proxy scanner(repost)

I need a proxy scanner that can scan though proxies. It must support sock4/5 and http proxies. It should be able to find http/sock4/5 proxies and verify them. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Exclusive and complete copyrights to all work purchased. (No GPL, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site). ## Platform Windows 2000 and WIndows XP