I have packaged a silent installation of Acrobat X Professional using the Customisation wizard. We have to make Reader the default viewer (without using a script after the install). No matter which option I select for the default viewer in the customisation tool (as shown below), Acrobat X Professional becomes the default viewer. I am trying to add or modify the installer database table so that it leaves the current association with Reader.
That has done the trick, thanks! I found yesterday I could also use LEAVE_PDFOWNERSHIP=YES on the command line to achieve the result, however we wanted to add to the Property table of the MST. In the case of LEAVE_PDFOWNERSHIP=YES this did not seem to work, but with IW_DEFAULT_VERB=Read it is working well.