hi,there are lots of auto cad versions. i just want to know the difference btw autocad 2011 and  autocad architect 2011.i am realy confused. because i downloaded autocad 2011 from net. it took me almost 50 hours to download. nd now my friend is suggesting me to install architect auto cad.btw i am an architect. is there a big diffrence in both ? please show me the right way. i can waste my another 50 hours for right thingthanks