Not just yet, lokitech.
EDIT: lokitech, I found my player. I had put it in a box with some stuff for a yard sale.
Installed the memory and switched on the unit. It took several seconds for the RaveMP to initialize the first time, but then it came up with 61MB free memory. 3MB was still being used by the "Frank Black" song that came preprogrammed in the unit, meaning that the memory didn't erase like the instructions had warned. I'm headed to the Sensory Science website to look for program updates after I post this.