Turn on Windows Installer service in Safe Mode, msiexec

In Safe Mode without network I need to add to registry:

reg add "HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\MSIServer" /ve /t reg_sz /d "Service" /f

In Safe Mode with network suppport I need to add:

reg add "HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\MSIServer" /ve /t reg_sz /d "Service" /f

After registry is moded I need to start Windows Installer service:

net start msiserver