This scene was a challenge for me and my computer because it was very big (almost 3,5 million polygons). At the end of the project, I had to upgrate my system to 4GB RAM and Windows Vista 64bit to render it because 2GB RAM wasn't enough.
So, it was a little bit hard and long process but fortunately I finished it before the deadline at 3.00 (morning). Thanks to Windows Vista x64 (wow, I didn't imagine I could even say that :P ).
Exterior animation