Operation Flashpoint: Dragon Rising is a direct sequel to 2001's hit combat simulation game Operation Flashpoint: Cold War Crisis and the expansion pack Operation Flashpoint: Resistance.
extract everything to programfiles/operationflashpointdragonrising(or whereever your game directory is)/data_win/missions/mission editor. Enjoy! My steam group is operation flashpoint: dragon rising {(OFDR}) so come and join us!