Thank you so much for the quick reply! i went into the max file of your rig and set the unit scale from inches to centimeters and it worked! i tested it against my model and some MB animations and its the right size 
if you don’t mind one more question the various dummy markers on the rig (ik on the fingers i think?) when i pose the biped to my model which isn’t the exact proportions of the epic model will it matter that they are not lined up they way they were before since i cant get them to move with the biped? thanks again!