Interesting question.
Goautodial is an installer for Vicidial (ie: has Vicidial in it). So ... you pretty much already have "the vicidial". Whether you need to "install the vicidial" or not remains to be seen. If you have not yet installed Goautodial ... you've probably got a long battle ahead of you and, yes, you'll need to install The Vicidial. This is done one of several ways: Vicibox.com's .iso installer or GoAutoDial's .iso installer or package installer ... OR manually from source code.
Since you appear to want to use the Goautodial screens (so you can swap out logos for your own), you'll probably want to use one of the Goautodial options.
But I have to warn you now: If you've never installed or used Vicidial in the past, you'll really want to perform a full install and make sure the system works before you attempt any customization.
This is NOT just a web site.