Okay. I solved that problem (the password for the SMF database was incorrect in my config-inc.php file. Fixed it.
Now I'm having other problems. And after the seventh time of dropping the database, re-loading the Reviewpost files, setting permissions, and running the install only to get hit with multiple errors, I'm giving up for now and going to bed. Six hours is far too long to spend trying to load a "simple-to-install" program.
Tomorrow I'll try to get some help from you all; and if that doesn't work, I'll be asking for a refund.