I recommend installing by model. Here are some details on how to configure that in MDT -
http://www.deploymentresearch.com/Research/tabid/62/EntryId/112/MDT-2013-Lite-Touch-Driver-Management.aspx
As for which files are necessary, the .inf actually contains which hardware ID it's written for in plain text, along with any required system files. When importing, you import by selecting the inf or cab (zip of multiple inf files) and MDT
will import the associated files listed in that inf to the out-of-box drivers folder.
Now the reason I say configure it as specified above, is because if configured properly, MDT will deploy drivers based on the folder of inf's you've imported. Usually what I do is go and get the latest deployment cab and import, and start with test
deployments with that cab. If you can't find the cab then you need to work to find the inf otherwise, be it through extracting from setup files. If you can't get it through extraction from setup and the file needs to be run on specific models,
then a post install step would be necessary to install the files required on that system. Hope this helps.
Ryan
