CORONAL MASS EJECTIONS (CMES) ARE LARGE-SCALE ERUPTIVE PHENOMENA THAT ORIGINATE NEAR THE SUN S SURFACE ARE ACCELERATED IN THE SUN S INNER CORONA AND PROPAGATE OUTWARD INTO THE HELIOSPHERE. THERE HAS BEEN SIGNIFICANT PROGRESS IN OBSERVATIONS THEORY AND MODELING OF CMES IN RECENT YEARS. HOWEVER MODELING THEIR ORIGINATION ON THE SUN AND AT THE SAME TIME FORECASTING THEIR SPECIFIC IMPACT ON THE EARTH IS STILL IN THE RESEARCH PHASE AND IT IS NOT EXPECTED THAT REAL EVENTS CAN BE ROUTINELY SIMULATED IN THE NEAR FUTURE. THE OPERATIONAL WSA-ENLIL-CONE MODEL DOES NOT ADDRESS THE SPECIFICS OF THE INITIATION PROCESS OF CMES; HOWEVER IT TAKES THE RESULTING CME OBSERVED REMOTELY IN CORONAGRAPHS DETERMINES ITS GEOMETRIC AND KINEMATIC REPRESENTATION AND LAUNCHES A CORRESPONDING HYDRODYNAMIC EJECTA INTO THE HELIOSPHERIC COMPUTATIONAL DOMAIN WHERE IT EVOLVES AS IT INTERACTS WITH THE BACKGROUND SOLAR WIND. THIS REPRESENTS A MUCH NEEDED PRACTICAL APPROACH FOR FASTER-THAN-REAL-TIME EVENT-BY-EVENT SIMULATIONS OF CMES PROPAGATION IN THE HELIOSPHERE THAT CAN BE USED FOR OPERATIONAL SPACE WEATHER PREDICTIONS.