I am currently using AutoCAD Architecture at work which allows me to use AEC "smart" objects (walls, windows, doors). This is a staple in my AutoCAD experience. I am planning on branching off and starting my own business and was hoping to only purchase AutoCAD LT, vs the mega expensive ACA, seeing as I don't use any of the other 3D tools. Is there any way to use these AEC objects with AutoCAD 2012? or even AutoCAD LT? Or are these tools exclusive to ACA?