erick. A thought on your original post. Even if your windows are 2D flat squares make them coponents. That way you will be able to edit an entire buildings windows (or any other repetivly used geometry) by changing only one. Also, you can use simply constructed components as placemarkers for more elaboratly modeled versions. You can reload the fancy version when they are needed. This will save your CPU for zoom/pan/orbit while modeling the rest of your city.
Always always always model on layer0. Move only entire groups to a diferent layer. If you come from AutoCad forget everything you know about layers.
Thanks guys. Actually, with little information on the subject, I decided in the end to import from Zbrush. having the hands sculpted for the product ended up being much more realistic in the end (I think anyway). And, though still curious... it is not pressing as it was. So, again... thank you.
i just installed and played with the sketchyphysics plug in and wow it's pretty cool, still need to get a hang of it properly but i think for what im thinking of using it for it'll really help.