For example, I use an Image share which contains a Drivers map. This map is defined in HII and contains also the .db3 file. The content download is scheduled for in the night. In the early morning I run a task that copies downloaded content from the default location to the Image\Drivers map. In Provisioning I choose to use UNC for HII, as with preferred servers, this is generally faster than downloading the drivers through HTTP.
Hope this helps!
Frank