This firmware is based on MadDog's 1.f1 firmware with NEC identification. In addition to MadDog's firmware, this one contains speed patches for selected -R and +R DVD media.
http://liggydee.cdfreaks.com/disclaimer/3540/1W7_rpc1.zip
http://liggydee.cdfreaks.com/disclaimer/3540/1W7_rpc1.zip