use the peice of wood to hook up the key, go back to the room and use the key on the door, now u can get into the room with the guy, pick up the crowbar, use it on the other door, (the one that resmbles the door you just came through) and go into it, pick up the rope that's hanging and there is a piece of paper where the plaster has crumbled (or whateva)
Now go back to the room with the guy that you knocked out. go though the door. You end up in a forest, pick up all the things (lighter, meat, bottle, axe)and go to the end of the path. you end up facing a dog and the back of a car. pick up the petrol can. 
in your inventory, drag the bottle onto the meat and you will "spice" the meat up. Give the dog the meat. Click on the ladder. put the axe in the little groove. Click on the axe. You go to a place where there is a guy sitting asleep. put the rope on him. Click on the petrol and the room will be covered. then click on the lighter.
Game finished!