wine users - Aug 2011 - Problems running Sims 3. Can you tell me what this error is?

Hi, I've been googling like mad trying to get Sims 3 working on Ubuntu 10.04
LTS.  I have wine, mono and winetricks installed and have tried all the tips I
can find.   I got rid of the 'no game disk' problem, then I started
crashing as the town was loading.  Sometimes the installer doesn't even get
to the intro video.

Anyway, this error is a recurring thing throughout, so I was wondering if it
might indicate my problem (or part of it).

wine: cannot find L"C:\\windows\\system32\\filename"

Any help with Sims3 would be appreciated.  Any info you need I'll try to
provide.

Thanks :)

BTW I bought the game, it's legit.