This may not answer your question, however, this is the process I use to install my HP Elitebook drivers:
Using HP SoftPaq Download Manager, I download the SSM-compliant softpaqs
I copy the downloaded files (.exe, .cva, and .html) to a share on my server
I add the required SSM files to the share (ssm.cab and ssm.exe)
I execute ssm.exe and hit next until the last screen where I hit "Build Database"
I add my ssm.bat to this share. The ssm.bat I created is this - %~dp0\ssm.exe %~dp0 /A
When finished, I create a package pointing to the share as the source, and create new program pointing to ssm.bat
Add install software task to OSD task sequence. I normally place this towards the end of the TS.
I do have driver packages installed, but only import the NIC so it continues the TS after the setup windows and configmgr task.
Hope this helps
