Install the msi from the Source directory

1. Go to MSI Script in CustomAction section

2. Select Normal Installation and goto Execute Immediate.

3. Under InstallFinalize

   Put If condition and set the condition as "NOT Installed and NOT PATCH"
4. Under that select "Install MSI from Installation"

1. CustomActionName : Install_Sentinel_Drivers
2. InstallationToRun      : .\Program Files\Common Files\SafeNet Sentinel\Sentinel System Driver Installer 7.5.1.msi
3. Property Settings      : REBOOT=RS

Under Properties Tab
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Processing : Synchronous, Ignores ExitCode
Scheduling options : Always Execute.