there is definetely a problem between dual core and single core cpus.
i installed cmsf on my pc (amd x2 4600+,2gb,8600gt with 256mb) and i have all the problems which are mentioned in the others threads (e.g. freeze, bad performance etc.).
after i have patched it to 1.01 it was not better.
i have then installed it on my girlfriend's pc (amd 2800xp, 2gb, 6800xt with 512mb) and guess what...it runs very well...so i was able to play the trainings campaign...