It will install (native) 2.2.X but offer to install SVN 2.4.X.
2.2.X is latest stable release, 2.4.X is developer (also presently quite stable and in use all over the place, but has some cool toys in it).
VicidialNOW has a Custom agent screen and a Private Label landing page on the root.
The custom agent screen has not been updated beyond 2.0.5, but 2.0.5 is no longer supported. the custom agent screen, however, is usable on any version of 2.0.5 and if it is updated will (in theory) be usable on any VICIdial that matches the version it's built for (VicidialNOW does not privatize the code or in any way segregate it from the main VICIdial branches, it merely allows it to run on CentOS and gardo also found a nice screen to include).
So ... if you want to use the cool screen you are stuck with 2.0.5 (any flavor). If you can part from the cool screen, you can upgrade vicidialnow to 2.2.X or 2.4.X via SVN ~OR~ you can install Vicibox Redux (presently at 2.0.2) which will install as I stated earlier.
Of course, if you're good ... YOU could upgrade that screen (do a "diff" on the 2.0.5 regular screen to the cool one and then apply the changes to the 2.4.X regular screen to get a cool 2.4.X version ... then post it back here !!)
I do not (BTW) recommend the custom landing page on the root unless you exclude yourself with a robots.txt to keep out google and similar for all other engines. You do not want anyone to know you have a "stock" dialer that may have "stock" passwords, stock ports, or ANYthing like that. It's an invitation for SSH brute force, SIP, IAX account theft. All sorts of stuff. Better to have a root web page that is just apache and does NOT link to your Vici stuff directly or obviously. (Or at all, your agents should have the link instead of needing an FQDN to go to)
But that's me.
(I'm the guy they call when the firewall is broken and they're in a panic, understandably)