As we pointed out in our review, Wiztiles is limited in terms of what it can launch due to the siloed nature of Windows Phone:
It's very important to stress here that Wiztiles is not a homebrew application - it's available in the Marketplace and follows all the rules that a Windows Phone application should follow. That means the ability to talk to other applications and areas of the Windows Phone operating system is limited... The biggest loss is that you can't launch an application from Wiztiles - you are limited to a handful of shortcuts to the built in applications. The saving grace is the Web Browser launcher, because you can associate this with a URL.
I find it better to think of Wiztiles as a fashion accessory, allowing you to give your Windows Phone a customised look. And like any fashion choice, there will be a sacrifice. Using Wiztiles does mean that some tiles will not have live functionality, but it makes a smartphone more personal and welcoming to its owner and in some circumstances that's more important.
Wiztiles can be updated from the Windows Marketplace, or you can download your copy via the AAWP App Directory.