This tool by Kentaro.k-21 can import and export text data to / from Dungeon Master II graphics.dat files.

Tool~Dungeon_Master_II_Text_Data_Importer-Exporter~PC~Version_Rev0~Software.rar
- Dungeon Master II Text Data Importer/Exporter Revision 0
Tool~Dungeon_Master_II_Text_Data_Importer-Exporter~PC~Version_Rev0~Source.rar
- Dungeon Master II Text Data Importer/Exporter Revision 0 (Source code)