How can I create a user account on Progress and grant privileges to a database? Where can I find information on the privilege system? I have searched the web and found nothing. Any help is appreciated.

I don't see that you ever got an answer to this so maybe I can help.

If you are accessing the DB from the Progress 4GL, there is no requirement to grant privalage etc. If the user can log into the database, either as a self-serve client, of via a network client/server connection, he has access to all tables etc. The application itself must then take care of any data security. If you are using SQL commands, I think by default every one has full access, and normal SQL commands can be used to restrict connections. I don't use SQL myself, so I have very limited experiance with it.