http://bugs.winehq.org/show_bug.cgi?id=25535
--- Comment #2 from Phil Dowson pjdowson@gmail.com 2010-12-16 13:25:57 CST --- (In reply to comment #1)
The filename of your .net installer sounds like it's a 64 bit version. Perhaps you should try a pure 32 bit solution, as the winetricks verbs you used are still 32 bit only.
The download used was from:
http://www.microsoft.com/downloads/en/details.aspx?displaylang=en&Family...
This installer supports both 32bit and 64bit installs, see "Supported Architectures:" under system requirements.