I recently had a requirement to pre-populate the Windows 7 Driver Store with some printer drivers so that non-admin users could add printers without the need to install drivers for this particular model. I utilized the PnPUtil command to do this during the SCCM Build and Capture Task Sequence which will copy and register the driver in the c:\Windows\System32\DriverStore directory on Windows 7.
Simply create a SCCM package that includes all of the driver files (.inf,.cat files etc) and then in your task sequence use a command line step to run “cmd.exe /c PnPutil.exe -i -a C:\_SMSTaskSequence\Packages\xxxyyyyy\*.inf” where xxxyyyyy is your SCCM package ID. This will scan that whole folder and copy and inject all valid drivers into the OS. I reference the C:\_SMSTaskSequence directory because my task sequence is set to download first and then run. Afterwards I found this article which does something similar but uses the %_SMSTS variable to provide the location - http://blog.coretech.dk/mip/personal-note-no-5-make-driver-available-for-none-admin-user/ - so if you run from the DP then this may be more useful.