"_x setSpeedMode ""full""" forEach units this
In the leader's initfield and they will run. Also:
this setCombatMode "blue"; this setBehaviour "AWARE"
That will make them never want to engage or fire on the enemy, and will move with their guns in their hands but not go prone.
You could also use
"_x setUnitPos ""up""" forEach units this
In the leader's init-field, that will make them never go prone, and thus move faster.
Note that it's two quotemarks "", then the word, then three quotemarks """ in these lines. So you don't get any error messages from OFP.