Specify an ini file for PFx Launcher?

Sorry if this has been asked already; I couldn't find it in the first few pages of this forum.

I would like to have multiple profiles, a clean one w/o any extensions for when I'm using the USB 1.1 computers in my school library, and the full one with all my extensions for everywhere else. I am thinking of having two PortableFirefox.ini files (obviously named differently) and specifying one based on what computer I am using.

Is there a way of specifying an .ini file for PortableFireFox.exe to use, using the command line? Could you perhaps drag-and-drop the .ini file onto the executable?

Thanks for your attention.