I've been trying to put my sd2vita as my ux0 instead of uma0 so that it can install the games I have. The problem is, and I've narrowed it down, is that when ever I have the storagemgr_config.skprx as:
INT=imc0
MCD=uma0
GCD=ux0
Vitashell comes up as an error after I reboot it. I had to reboot...