Load kext in recovery mode
I think that is quite simple just make sure you mount your Main drive in disk utility in recovery then make more of your Main drive name then quit Diskutilty and click on Utilties on the upper menu bar and then click terminal and to load your kext simply type kextload -b /Volumes/Maindrivename/Library/Extensions/kextbundle 
Just make sure you replace the command I provided accordingly.