Activate relative paths

Hi,

I'm writing a script that will set max settings the same to each user on the same project.

I can't find how to check the box 'Convert local file paths to Relative' in customize - preferences - Files with maxscript

I found how to activate 'Convert file paths to UNC' like this:

 pathConfig.resolveUNC SystemGlobal:resolveUNC true 

anyone know how to do something similar with 'Convert local file paths to Relative'

Thanks