If you're having those kind of delays, you're likely having collisions that make no sense. My machine is 1.2 with ~700 MB RAM, and if a singe frame of most simulations takes over a minute, something is usually wrong with my setup. Make sure that you don't have any intersecting polys at the start, and that any movement that your figure is doing from the neutral pose is slow (if it's too fast, increase the number of "draping frames") The cloth room is very usable, and with a bit of practice, should replace conforming clothing for many applications.