Vista Business, File & Print Sharing, snetcfg

I'm trying to install file& Print sharing via a script or batch file onto
domain based vista business pc's, preferably without user input.

I've found that running snetcfg (xp based one) actually works but gives a
prompt about unsigned driver install. I've tried to get round this in several
ways -
By using the bootoption command
By creating a self signed cert and adding to the exe

But the prompt still appears.
Once you have run this once it does not prompt again.

Is there anyway of doing this at all ?. The vista is 32 bit.

Cheers

Roger