Help with switch for Mathtpe 5.2

[Mr_Mo]

So far I have made it install silently (the progress can be seen, but that doesn't matter), but after installing, a window pops up asking if I want to read the readme file, and if I want to launch Mathtype, how do I get rid of that?

So far I have extractet the setup file with winrar and used:

setup.exe /DL "%programfiles%\Mathtype" -S "X:\X\X" -C -W -I

Using this guide

Can anyone help me?

2 more questione, how do I get rid of the "Open file - Security warning" in SP2?

And the other one, is there a program that i can setup to choose which components should be installed, and then it automatically adds it to the registry in runonceex?