Welcome to the forums, EgWal
Let me introduce you to a good friend of mine... the foreach command. (God... what sort of sad bastard has OFP editing commands for friends ;D)
Try this:
In the init field of your leader:
"dostop _x" foreach (units group this)
That will execute the dostop command for all units in the leader's group. Similarily, you can use it to salute:
"_x playmove ""effectstandsalute""" foreach (units group ryhmä1)
Note the double quotes. These are necessary to have a string (the "effectstandsalute" bit) inside another string (the "_x playmove.... " bit). Trust me, it looks stupid but there are no typo's in there