Ben.
Thank you for your reply.
I have encorporated all the MST files into the 9.5 MSI as per the instructions. I have a setup.ini and mst file. When i check to newly generated MSI it has all the preferences contained. When this is deployed it shows as 9.5.4 on completion but the default settings have returned.
my command line is setup.exe which deploys the product with the preferences intact.
If i do not include the MSP updates and customise the prefrences in the wizard the resultant MSI correctly sets the preferences.
I conclude the MSP is responsible.
Any help appreciated,