many members on some sites know how to fix already those games. check dark souls it can't be fixed with those tools we have. as i said before someone told me to use his method: decrypt and encrypt to lower fw and not npdrm but app with scetool, then decrypt and encrypt with multiman ebootfix
and again scetool to make npdrm eboot. that is the method he used to make many eboots working. i don't know if those are true and can work really.