Driver management in SCCM 2012 is generally quite boring.
To help you in this task I have created a tool that will capture installed drivers and then import them in SCCM 2012.
The tool is made of two utilities:
This is the client part of the tool, this utility captures all installed drivers on a workstation and then send them to a specified UNC share. Drivers are sorted by driver class in the destination folder. This utility can be used with a GUI or silently from the command line.
This is the server part of the tool, this utility parse the drivers capture folder and import all found drivers into SCCM. Each imported driver will be assigned to proper drivers categories and then assigned to a driver package.
You can download it here: http://gallery.technet.microsoft.com/ConfigMgr-Driver-Injector-aae7d17d