Alternative to bridging

[sinogap]

this is my website http://sierri.net/
I currently have a lot of sections that reequire users to register.
Is there any script that I can install that makes the user register for one master account that has all the sections and their login info, so the user has to login to the master account, and go to the my account page and it will show him all the sections of my site that he's registered to and when he clicks on the section it will show him its login info. can anyone please help me with that?

[sinogap]

can anyone help?

[VPmase]

Well, the site is down for me...
But you could make all the services connect to one db and one table with all the users and etc