Not sure about the patch by H.Sie as I do not use it yet, however you can also get the 4 gig patch here;
http://www.subsim.com/radioroom/down...o=file&id=2888
Give that a whirl, however I usually find if it's a memory thing, the game generally ctd's 99% along the progress bar if that makes sense
Best regards.
Fubar2Niner