http://bugs.winehq.org/show_bug.cgi?id=5485
--- Comment #28 from Andrew Paterson andrew.paterson@lautus.net 2007-08-22 05:55:34 --- Using 0.9.43 I can confirm that this is definitely a dual CPU problem - not sure if this helps anyone.
Anyway C&C Generals installs and runs flawlessly on a bog standard P4 system but when I run it on Core2 Duo it hangs on the splash screen with one CPU at 100% (game.dat).