Under Distribution in the Console use HII Driver Management and click on Build Library and you can specify the path and if you are using Preferred Servers be sure that path get replicated as well. We use the ldmain\landesk\files\ directory and just have a Drivers folder which gets replicated to our Preferred Servers so that when imaging it uses the Preferred Servers to get drivers via HII. http://help.landesk.com/Topic/Index/ENU/LDMS/9.5/Content/Windows/osd_hii_t_driver_repository.htm
here are some articles to help: