Vista - check printer driver if exists continue if not install

Hi All,
With the help of many of you out there I have managed to create a script
that will;
1:create a TCP\IP port
2:Add the driver (via an inf file)
3: add the printer to the new port
4: set this as default

happy days and a big thanks to all of your guidance. I do however have an
additional request of you all. With this installation if the driver exists
on the machine I get a windows prompt to do with conflicts. sorry I dont have
the exact error.

my question so to speak is .. is there a way to determine IF the driver is
installed, if it is, use it IF NOT Install this driver and use it?

I currently am just copying the driver files to the local machine and
installing it regardless. obvioulsy the less the script has to do the better.

I am presuming that I can just butcher this section of script;
'adding the driver

strComputer = "."

Set objWMIService = GetObject("winmgmts:" _

& "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")

objWMIService.Security_.Privileges.AddAsString "SeLoadDriverPrivilege", True

Set objDriver = objWMIService.Get("Win32_PrinterDriver")

objDriver.Name = "HP LaserJet M3035 MFP PCL 5"

objDriver.SupportedPlatform = "Windows NT x86"

objDriver.Version = "3"

objDriver.DriverPath = "C:\temp1\hp3035\hpz5r5io.dll"

objDriver.Infname = "C:\temp1\hp3035\hpc3035b.inf"

intResult = objDriver.AddPrinterDriver(objDriver)

toinclude the if \ then statement to gimme what I need?? Anyone got any
Ideas.

Cheers
Balgrath