Best script to create users for password protected pages?

I am looking for the best script to create users for password protected pages, I am unhappy with what I have found so far.
I am looking for something that will only give access to members after payment. Preferably PayPal IPN compatible.

http://www.sentrylogin.com/sentry/features.asp (too expensive)
http://www.russianlondon.com/scripts/freepaypal (best I have found so far but I am not sure if I will be happy with this sign up process, and I am fear I will want to use it on more then one site and they say it costs $75 each time you want to use it on a site)
http://www.withinweb.com/phpsecurearea/index.php (may not have all the functionality I am looking for)

I would love to find something open source, or hear what you recommend, or what you use.

I might be wrong, but i think most people here will be more geared towards writing their own scripts, so u may struggle for opinions.

However, if you choose to write your own we may be able to help.

I would like to be able to write my own script. I leant how to do this type of thing with asp.net but I have to make this site on a lynx server with a MySQL database rather then windows and MSSQL. PHP Code seems more complicated and would take me a week to make a code for a site like this.
What is PHP code called? I don’t know much about it but it dose not look like visual basic or C+.
After customizing many PHP pages I have learned allot, maybe one day I will be able to attempt writing a complex script like this.

MySQL should be a snap if you know MSSQL. Not trying to be a smartass, but PHP code is called PHP. If you know ASP.net it should be not too terribly difficult -- I think PHP would be considered a bit easier, both to learn and to use. It's often compared (favorably) to ASP.

No it's not like C+ at all. It's a server-side scripting language created to support web pages, again, very much like ASP or CGI.

Your choices are 1) Pay a good price for a software package or 2) Learn PHP (and MySQL, although you can probably pick up enough to get started in an hour if you know another SQL flavor). There isn't a free script suite, AFAIK, that won't take almost as much work and PHP knowledge as if you started from scratch.