http://bugs.winehq.org/show_bug.cgi?id=20110
--- Comment #7 from Hans Leidekker hans@meelstraat.net 2010-06-01 01:59:29 --- The patch attached to bug 19502 also works here, provided you store a copy of vcsetup.msi and vcsetup1.cab in $WINETRICKS_TMP (and make sure to comment out all the 'rm -rf $WINETRICKS_TMP' occurrences in winetricks).
Accessing the original media could be a bug in msi, we need to test what happens on Windows when you remove these files before starting the service pack installer.