How to unistall Device Drivers via MSI with DPInst?

Hi all. I have a doubt a bout how to unistall device drivers via MSI.

We are now install the drivers via MSI using as custom action a VBScript and when we plug the device in it works perfectly but now we have a new problem. The problem is unistall those drivers.

When uninstalling we use a very similar VBScript as when installing, somethin like this:

Dim oShell
Dim source Set
oShell = CreateObject ("WSCript.shell")
dir = oShell.ExpandEnvironmentStrings("%Temp%")
dir2 = oShell.ExpandEnvironmentStrings("%windir%")
source = dir + "\Device Drivers\"
dir2=  dir2 + "\system32\DRVSTORE\"
oShell.Run "cmd /k"+" cd"+" "+source+"DPInst_x86 & DPInst.exe /s /u "+" "+dir2+"toaster_4644C6CF04F87E5745CAF63D887EAACCF779346F\hpzid413.inf", vbhide


If we run this script manualy, it unistalls correclty  the Driver but when we try to run it from a CustomAction from the MSI when Removing the application.

We are not pretty sure of what sequence number set for that action on InstallExecuteSequence Table.

Well that´s our problem.  I hope some of you could help us.

Bye bye...