just modify reset_mse makefile from mshl2tools as follows:
and just copy r4idsn_sd.dldi from wood r4 into reset_mse source folder
ifeq ($(strip $(DEVKITARM)),)
$(error "Please set DEVKITARM in your environment. export DEVKITARM=devkitARM)
endif
include $(DEVKITARM)/ds_rules
export TARGET :=...