Adding Customs(Concern)

[Eidolon]

What is the latest/easiest way in adding customs?

For example, custom headgear sprites,

Is it the ol' put-them-here-way?

data\sprite\¾ÆÀÌÅÛ\
data\sprite\¾Ç¼¼»ç¸®\¿©\
data\sprite\¾Ç¼¼»ç¸®\³²\
data\texture\À¯ÀúÀÎÅÍÆäÀ̽º\item\
data\texture\À¯ÀúÀÎÅÍÆäÀ̽º\collection\
data\luafiles514\lua files\datainfo\accessoryid.lub
data\luafiles514\lua files\datainfo\accname.lub
data\idnum2itemdesctable.txt
data\idnum2itemdisplaynametable.txt
data\idnum2itemresnametable.txt
data\itemslotcounttable.txt
data\num2itemdesctable.txt
data\num2itemdisplaynametable.txt
data\num2itemresnametable.txt

 

What about the other customs? (e.g. maps)