I have been looking for a solution to this problem. I need to put my company manual online. It is folders with pdf files. I need a software that will allow me to have an administrator username and password that can edit and delete these files and a username and password that will only allow viewing of the files. About 200 people might access this site at any time so the username would need to be able to give access to anyone who has it and the password. I have tried dropbox and others like it but they just send out a link that does not include a username and password. Any ideas?