http://bugs.winehq.org/show_bug.cgi?id=22304
--- Comment #5 from Kenneth Robinette support@securenetterm.com 2010-04-08 07:14:44 --- (In reply to comment #4)
In Installshield, an option is given to mark these files not to be overwritten. This is passed to the Microsoft msi installer.
What is passed to msi, and how?
Don't know. I don't work for Installshield, nor any of the vendors that have acquired Installshield. Nor do I have source to the Microsoft MSI.
As a user of Installshield, I simply right click on a file, select property from the popup menu, select the Advanced tab on the popup dialog, then select the "Never Overwrite" option.
I suspect all Windows based installers support this option, but can only state what Installshield does since that is the only installer we use.
This option is critical to most professional applications that allow for user preferences file(s).