Help adding objects to my tile map

I have a Tile map and I am trying to add interactive objects to it.

Would I make all objects as another tile layer?

If I did make the objects as another layer how would I make them interactive and to keep it simple click on a object say like a car for example and have it attach itself to the cursor then when I click again have it stick to that coordinates on the map? The issue is more towards putting the object on the map first of all then selecting it. I believe once I conquer putting the object on the map then I can pick it up off the map.

I just need the theory behind it I believe and I probably can figure it out my self if I cant I will just ask more questions.

I am using DirectX and the newst compiler I just need general guidence to get the ball rolling

[1462 byte] By [kingpinzs] at [2007-12-23]
# 1
Tile mapping techniques are demonstrated in the Simple2D sample in the SDK.
DavidWeller at 2007-8-30 > top of Msdn Tech,Game Technologies: DirectX, XNA, XACT, etc.,Game Technologies: General...