13
you must have copied over mainfile.php with the files from the XOOPS package..
did you try to copy the files again, when your ex screwed the site up initially?
copy the contents of mainfile.dist.php into mainfile.php and fill in all the fields required.
the url, path, db username, db hostname (localhost), password etc etc..
or if you have the install directory on the server, you can run the installer, fill in the fields, then when it says the contents have been copied to the server.. you can quit before it gets to the database section..