Add Drivers to Windows Install .ISO

Generic Microsoft Windows Server [login to view URL] installation needs to have NIC & HBA drivers added so that the install can "see" SAN disks. I'm looking for a "process" that can take an "iso" and add drivers as needed. Of which one can use the .iso to perform installs to local disks (normal) or SAN disks. Currently I can 'browse' the install media to manually mount the drivers...I want/need to proces to add drivers to the 'correct' location so the install "see's" them at "boot". I have the media, I have the drivers...I (the entire world) needs a process to automate the driver update.