Well I had to drop the glitz and graphics down quite a bit on my PC and laptop - which are not bleeding edge.
PC - P4HT 3.2Ghz, 1GB ram, X600 (256mb)
Laptop: Duo Core 2 T5600, 1 GB ram, X1400 Hypermemory (128real/128 shared).
I still have lag int he cut scenes but it is playable and not...