no just rename the map on the sd-card temporary the settings in preloader/boot2 can conflict in some cases with mios it's rare, but with latest mios and cioses and bc and system menu you don't need it except for recovery when ever you got your wii bricked.
you could also use nandclean to reset your settings but it's not stable and never made stable, remake a boot2 or priiloader would be best if you like it. oh and before you install dios mios or cmios, first reinstall Original mios latest edition.