Rob, I'm brand new to WiX but I've been tasked with creating new installers for our product, which requires multi-instance support. We've been investigating different ways of doing this using instance transforms, but we've been struggling to get this working. One idea that we're looking into right now is to not use transforms, but rather use the MSI API to change the necessary data in the MSI database on the fly for each instance. This would be done inside our own bootstrapper, which would be responsible for managing all of the product guids for each available instance. One significant reason that we like this approach is that we can contain all of the complexity of multi-instance installs inside our bootstrapper, making it easier to roll this out to other product teams in our company that also need to do multi-instance installs but who don't know WiX. We'd like to know what you think about this approach and if there are any pitfalls we should be aware of. Are we totally crazy here? Any input is appreciated. Thanks, Tim

Tim, thath sounds crazy as first thought. Are you any further with your ideas, as we are facing the same problem in future