That's not as difficult as it seems unless you approach it from the "dialer" direction.
Either:
Go to MySQL (or the maker of the database software of your choice, but I use MySQL) and look for the "how do you load this database onto this OS" instruction set. They are all about making it easy to use their software, hoping for you to purchase a "pro" version or tech support down the road.
OR:
Go to the maker of the OS (CentOS you said?
www.centos.org) and either look for the simplest "LAMP" install, or a basic install and instructions for putting in a database after installing. LAMP would be for "Linux, Apache, MySQL, PHP". and after you're done with the "Just install it from my disk" install, you'll have a functional OS with Database and Web Server so management can be done through web software.
And in both cases hundreds of "i don't know how to do this" people do it every day on the OS and Database websites. So it really isn't hard and there are a lot of support forums for it. If you can burn a CD (aka: .iso) from a download, you can get it going. Many of the sites even give you step by step instructions for this.
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If all that is still too complex ... you CAN do the same install for your database server that you did for your Vicidial server and just not use Vicidial on it.
Then you can ask someone how to point Vicidial to it instead of the local Vicidial box. Once again not too hard to do, you'll likely figure it out without a lot of help.