for the beginner ....

hi …
i hope someone can help me …
i have a formac PROformance III with openGL hardware sup. so i also have the openGL drivers for apple inst. if i need this ext. or not …? is it right that i need only the formac openGL renderer ext. for a acc. openGL under cinema 4d XL …
i hope some one understand my quest. and can help me … thanks and respect