"With the way LCS and VCS sold on the PSP, isn't the PSP port (if done well) likely to crush 1MM? Or are you talking ship-in only?"

good PSP games these days sell something like 500K-1M lifetime.  So 1M ship is mainly because it's the GTA brand name - the top brand name on PSP.  But it's still a port so I'm not sure.  If I'm wrong and they can ship and sell 2M+, that would make it pretty easy for TTWO to beat expectations in Q4 imo (if Bioshock is on time).