XP command line install:
Setup information files have the *.inf extension and are often used to install registry settings and device drivers. To manually install an INF file, the user might be able to right-click and select install from the context menu.
[ If this does not work, try the command line below]
 
However, you might want to be able to install the inf from a command-line. Heres how:

rundll32.exe setupapi,InstallHinfSection DefaultInstall 132 file_name.inf
 
[list]file_name.inf = file to install
132 = flag to ask the user before rebooting
DefaultInstall = name of the section to install
