Membership gateway

I need a free membership script, which sends out email to the user (upon signup) then they use the unique username and password given to sign up.. It NEEDS to be exactly like this script: [login to view URL] (JOIN 4 FREE SCRIPT) The script here is $50 US which is very expensive for this sort of script, I am trying to find a free one on hotscripts, but thought I will post here and try toget a cheap one, it would be better if you have one ready, so you don't have to write from scratch.. CHEAPEST bids will win this project Thankyou (can be in ANY programming language) ## 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) Complete ownership and distribution copyrights to all work purchased. ## Platform Unix and WIN or just Unix