Standalone: setmixerparallel without manually editing .maxpref

When creating a standalone using the standalone object and a custom "Preferences File Name" is it possible to:

Set the .maxpref setmixerparallel attribute to "1?"

I'm not aware of a message to Max or MSP that controls this preference or an attribute to the standalone object that will set this value when the custom .maxpref file is created on standalone first launch.

The only way I can think of is to manually edit the .maxpref after the standalone first launches.

Related: Does setmixerparallel function in a standalone as it does in MaxMSP?