WordPress MU

hi...

i want my users to directly become a contributor of 4 blogs whenever they sign up...

since i am a total newbie i don't know a thing about wordpress and so i am stuck here... can u tell me how this can be achieved ..

Thanks

Well I am assuming that you have installed Wordpress MU. Then the only thing you have to do, is to go to the blog, and go to Users->Add new, fill in (existing) username and e-mail, repeat this to the users to the specific blogs.