http://bugs.winehq.org/show_bug.cgi?id=34272
--- Comment #5 from Ken Sharp kennybobs@o2.co.uk 2013-08-16 11:40:02 CDT --- Unfortunately Winetricks just checks the file exists and assumes it's installed.
installed_file1="$W_SYSTEM32_DLLS_WIN/mfc100.dll"
Try:
WINEDLLOVERRIDES="msvcp100,msvcr100=n" wine ~/.wine/drive_c/foo/bar/app.exe