(enlightened sigh) The difference between a sub-machinegun and a machinegun is that the former fires pistol ammunition, whereas the latter fires much bigger stuff. Thanks, History Channel! (I'm just loving Guns of WW2 week :)
I'm going to try to tweak my BIOS settings to see if I can't weasel some more performance out of my RAM (as explained here
)... right after this show.