dpinst

I have a setup MSI for our application, and I also have signed FTDI drivers that need to be installed as well. I'd like for them to be installed with Burn rather than the WiX MSI to keep CustomActions out of the MSI (however, I've tried the CA route as well). I've tried putting the instruction in an ExePackage , but the SourceFile attribute asks for the file location during build, not runtime (e.g. <ExePackage Id="InstallDrivers" DisplayName="Installing Drivers" SourceFile="[InstallFolder]Drivers\DPInst.exe" InstallCommand="/SA /SW" PerMachine="yes" After="MyMSISetup" Description="Installing

I followed the tutorial here: http://www.codeproject.com/KB/library/driver-install-with-wix.aspx but it just doesn't seem to want to work - the DPInst exe never actually seems to run? All the files are being laid-down correctly - I even noticed that in the tutorial they missed a quote. My custom action looks like this: <CustomAction Id='Install_M2_Driver' Execute='deferred' Directory='DRIVER_ROOT' ExeCommand='"[dirDpInst]DPInst.exe" /SA /PATH "[dirM2]"' Return='ignore' /> I even tried replacing the DPInst.exe with a simple exe that echoed the arguments back to me, everything looks good, if I