I have found out that team LDX has purposely included the ff. non-working files:
so that the save utility and, the memory stick access under game will not function. Meaning... they intendedly do this so that we can't test if the 5.55 games really works.
My solution so that the ISO memory stick will be accessed... I changed the ff. included files in the package with sony's 5.55 OFW official files. Sad to say, 5.55 games still doesn't work under the so-called 5.55 LDX-B CFW.