How can I get my site to accept members?

[Avalon]

I am thinking of introducing a membership into my site. I haven't decided the details (free or what not). I would like to know how can I go about getting a good script and how hard it is to impliment?

Thanks

[angeljs]

I recommend locked area lite...it's excellent and fairly secure:
http://www.locked-area.com/html/lite/features.html