If Mistral's suggestion doesn't work you can try (this is more for driver files):
rundll32.exe advpack.dll,LaunchINFSectionEx inf_filename,[section name],[cab name],<flags>[,smart reboot]
INF Filename: INF filename you want to launch. If the given name is not full pathname, advpack.dll will extract the INF from the given CAB file.
Section Name: INF install section name you want to launch. If it is empty string or NULL, DefaultInstall section name will be called.
Cab Name: Specify the fully qualified CAB file pathname which contains the files or INF you want to install to the user's system.
Flags
Flag Meaning
4 Quiet Mode, no UI
8 Don't Run GrpConv
16 Force Self-Updating on User's System
32 Backup Data Before Install
64 Rollback to Previous State
128 Validate the Backup Data
256 Complete Rollback to Previous State
512 Force Delay of OCX Registration
Smart Reboot
N No Reboot
A Always Reboot
I Reboot if Needed (default value)
Example:
rundll32.exe advpack.dll,LaunchINFSectionEx myinf.inf,,c:\temp\mydata.cab,36
This means to extract myinf.inf file from c:\temp\mydata.cab file and launch myinf.inf with DefaultInstall section in Quiet|Backup install mode, reboot if needed.
rundll32.exe advpack.dll,LaunchINFSectionEx c:\windows\inf\myinf.inf,,,256
This means to rollback to the state before installing myinf.inf DefaultInstall section.