Max - 2013-09-11

Hello everyone,

i need your help.
I try to install 7zip with a script but silent. Its easy with the parameter /s and works.
But i cant find the parameter to set 7zip automaticly as the default programm to open archives.
I also want that if i rightcklick on a archiv that 7zip is automatically displayed as a suggestion to me.

It would be nice if someone could help me.