How to write to 64bit registry path from a 32bit MSI using a MST using ORCA tool

In my earlier blog, I posted about how to create a transforms file to install a registry to 64 bit location in 64 bit OS using transforms in a 32 bit vendor MSI using Installshield tool.


So, in this current post I will explain how to achieve this using a simple ORCA tool.


1) Open the MSI using ORCA tool. Select Tansforms from the menu bar and click on New Transforms. This will create a new transforms where you can do the modifications.


2) Add a new row in Component table and create a new component and set the Attribute field to 256 as shown below.


Component attribute 256 - Set this bit to mark the component as a 64-bit component. (https://msdn.microsoft.com/en-us/library/aa368007(v=vs.85).aspx)


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3) Add a row in FeatureComponents table and map the newly created component to an existing Feature.


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4) Go to Registry table and select the registry for which needs to be installed to 64-bit path and set the Component field to the newly created obove component.


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5) After doing the changes, select Generate Transforms from the Transforms Menu bar.


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6)) Test for the functionality by executing the msi command along with the transforms file.


msiexec.exe /I "path to msi" TRANSFORMS="path to transforms file" /qb!


NOTE: Since the MSI is meant to be 32-bit, you can ignore the ICE 80 error instead of messing up with the MSI and changing its behavior and just document the acceptance of the ICE80.

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