the modified npcname.dat which distinguishes boxes from chests works only on official files servers, it doesnt work on l2j servers, since l2j has different method of deciding if one chest has scrolls inside.
mallon ennoei oti mesa sto directory exei etoima scripts gia to kathe class wste esy apla na ta kaneis load kai na mh xreiastei na ta ftiaxeis apto mhden
check one of these :
http://www.maxcheaters.com/forum/index.php?topic=61216.0
http://www.maxcheaters.com/forum/index.php?topic=69172.0
http://www.maxcheaters.com/forum/index.php?topic=22553.0
http://www.maxcheaters.com/forum/index.php?topic=100322.0