http://bugs.winehq.org/show_bug.cgi?id=22304
--- Comment #8 from Hans Leidekker hans@meelstraat.net 2010-06-02 03:34:13 --- Created an attachment (id=28511) --> (http://bugs.winehq.org/attachment.cgi?id=28511) msi: Honor msidbComponentAttributesNeverOverwrite.
Can you try this patch? It should apply with some offset.