I just tested Luigi's Mansion now on original 4.1 NAND, it works fine with gateway v1.2 (as expected). It prompts for 4.5 update with gateway v2.0b1 (also does the same on 4.1 emuNAND).
I wonder if this can be used to update emuNAND, that will be interesting.
Are you sure you ran it with...