I'm not sure exactly what you're asking for here.
If you asking to change the icons of pinned items on the taskbar, there are several options available with Start11v2.
If it is a folder, you can change the folder icon in it's original location. When it is pinned to the taskbar, the icon you selected will be used.
If you use Start11v2 to pin the folder to the taskbar before changing its icon, once it's pinned you can right click it, and then right click the folder name and select the properties. From there you can change the icon. You might have to restart explorer for it to take effect.
The same holds true for pinning files to the taskbar. Once it's pinned you can right click it, and then right click the file name and select the properties. From there you can change the icon. You might have to restart explorer for it to take effect.
To use a custom icon for an app is a more complicated process, but it can be done. However, if you are using the Start11v2 Enhanced taskbar, the icon that is used is provided by Windows and not customizable.
Hope this helps.
