I'm sure you already solved this another way, but if you don't enter the USEREMAIL and ACCOUNTEMAIL in the MSI, you can prompt for them with something like AutoItScript easily: Dim $username = InputBox('LogMeIn Installation','Enter a LogMeIn username:') ShellExecuteWait('logmein.msi', '/qn USEREMAIL=' & $username & ' ACCOUNTEMAIL=' & $username, @TempDir, 'Open', @SW_HIDE) Exit You can do the same thing for password, etc. You can even make a fully compiled single-file installer to make sure no one messes around with your MSI: Dim $username = InputBox('LogMeIn Installation','Enter a LogMeIn username:') FileInstall('logmein.msi', @TempDir & '\logmein.msi', 1) ShellExecuteWait(@TempDir & '\logmein.msi', '/qn USEREMAIL=' & $username & ' ACCOUNTEMAIL=' & $username, @TempDir, 'Open', @SW_HIDE) FileDelete(@TempDir & '\logmein.msi') Exit