Wow wow wow , too many action! You dont need NEI api or stuff like that , there is 100% WORKING AND GREAT SOLUTION - override haveSubTypes , and just dont do anything in it... What haveSubTypes do - adding all you items into creative tab list , and what nei is doing - its showing ALL ITEMS THAT ARE IN CREATIVE , and no more than that.Soo if you dont add item into creative - you dont add it into NEI. And if you want item in creative - there is other solution...but how i can see , you just dont need any "other like NEI mod style" mod support , soo go and just...just....dont read what i writed