I've just started to play Fo1 again and I can't seem to remember how to move NPC's out of your bloody path! If I remember correctly you could do this, right? Someone please help me before I stick a spoon into Ian's throat....
The "push" command was only implemented in Fallout 2. However, if you initiate Combat and then press Turn, Ian may move about according to the level of distance you set between him, i.e. stay close or spread out.