check out the attachments I posted in this thread:
here!
You set up the execution position by selecting an object & then on the properties tab for the selected object where it says "Alignment of character to object" (or whatever it says in German language version) you set the alignment via the compass & you set the character position either via the 2 text input boxes or you can click on the little man icon thing to the right of the text boxes which opens up a window in which you can set the player position for executing an command by left clicking the position on the scene in the new window.
you can only have one execution position per object but you can create multiple objects over same area & use conditions to disable the ones you don't need based on current command or something... you can also: make the character move to another position & re-align after character reaches the objects assigned character execution position or you can use execute (immediate) commands but they are mostly used for examine or possibly mini-games or setting off a cut-scene; unless you prevent player from clicking around scene while an immediate action is being performed, it can lead to messy results.
alternatively you can also create action areas via the way system for the scene which can trigger actions on character enter/leave action area.