lol i am using it .. and no problems with it..
i am not hacker :D its not my creation.. i only reupload it.
This error can appear if you run just L2.exe ... so i think its safe to use.
Really nice but here is one problem. Design stealed from http://www.darsain.net/item.php?id=27 he is owner of this template and he want make complaint for the thief of his work. But np its your problem.