The installation process requires access to your web server as well as database server. Web server access is connected through FTP, and database through a valid account with the following information:
SQL server IP
database name
database username
database password
About FTP: yes, you need to make sure that when you give me an account, that account can see and upload files to the forum folder on your web server.
And I will install the software on your site by uploading files to your web server, and then run a SQL script to install the database object. Then I will initialize the database and configure some of the basic aspects of the software so that you can start working on it (adding forums, galleries, etc.).
I can wipe out the old installation with the basic installation service, but to hook up registration I will need to examine how he did it, and will require an additional unit of installation service to complete the task.
Contact me through the contact form (the contact button on the header of this page) if you need to send private info to me. The contact form is protected by SSL.