Software Deployment

I'm using the provided msi to deploy this application and have used the relevant files to configure this to be silent and so far it's installed as expected however i can't seem to specify the Country/Region automatically like all other promts i've managed to suppress

Looking on Adobe's site there is an article on how to set up a silent install and does say:
To start the install, open the Windows command line utility, and enter the following line with the appropriate modifications:

"<Path to OEM.exe>" /L#### /SN /V

but i'm deploying this using the msi not the exe and has been possible to suppress all other prompts so must be possible!

I thought adding the following to the setup.ini file would help [Startup]
CmdLine=/L1033 %temp%/Pre7.log & RequireExactLangMatch=1033
but had no effect.

I'm using an "application.xml.override" file with the following content which has so far suppressed all other prompts <?xml version="1.0" encoding="utf-8"?>

<Configuration>

<Payload>

<Data key="EULA">Suppress</Data>

<Data key="Registration">Suppress</Data>

<Data key="Updates">Suppress</Data>

</Payload>

</Configuration>

so am wondering whether something can be specified here!!?

Any ideas?