Re: how do you use the memory card
Ok, this is a regular question.
Firstly the folders are nessesary and are a factory installed feature which allows the keyboard to be a cross platform, multinational device. If you delete something important you will have to ask Art Lebedev for the files again, less you back them up.
Exporting and importing are really for backup purposes only but as you say also come in useful to converting the default layout.
So yes you can change some of the keys to be displayed without Configurator running but if any keys have a script or link attached, they will not work without configurator.
Follow the instructions here