I did it 5 min :
https://www.mobileread.com/forums/sho...6&postcount=15
It saves my kobo mini + 4gb Sd card ! (But it needed to open the device and get a sd card reader device)
Tested & 100% working now (Updating by kobo Inc to the last firmware )
I used "USB Image Tool.exe" to write it to the kibi mini
Maybe u can change size of the last partition with a Disk Manager sofware if u want absoltly a 2gb card. Finally that s the opposite of
https://www.youtube.com/watch?v=73QGYk2q80M
so try it !