Anyone know where I can get a firmware for the Sanyo CRD-BP1800P? And if so, any idea if it will upgrade the Sanyo-based TDK 40/12/48x to 48x write speed? I looked on the Sanyo site, but they only had firmware updates for the CRD-BP1700P, which is Sanyo's designation for the TDK 40/12/28x.