ADS: How to setup (config) the path of pre-defined substrates and materials on a network shared folder instead of technology folder of installation dir?

Hi experts, 

While creating a new substrate , I would like  use our own pre-defined substrated and materials in a shared network drive, instead of using ADS predefined substrated and materials stored in the technology folder of installation directory. 

Which configuration file (de.cfg? or de_sim.cfg?) and variable for me to modify to do so?

Thanks,

John