관련링크http://pub.paran.com/openkore/GRF_file_format.htmhttp://www.neatocool.com/Projects/Ragnarok/ActOR/http://mist.in/gratia/ro/spr/index_e.htmlhttp://rolaboratory.ximosoft.com/file-format
( Update )
http://www.grfbuilder.com/