I cant work it out. I need a little hint about how to get the gun at the end, cos i really dont want to use the walkthroughs. Just a little hint. Pleez?

Well, the gun is in the trunk of the car and the key to the trunk is with Sal's body which is God knows where.

Have you opened up the suitcase yet?

The ticket will guide you to the body. First you have to go behind the greenhouse and then get the ticket out of your inventory. It'll provide a rough direction. This puzzle is similar to the sign in the forest.