Pacific digital dvd burner

I have A pacific digital mach-8 dvd burner which reads and burners slower than the than the pioneer 4 speed burner that I was planning on replacing. I Install non official pacific digital firmware from the softpedia website by mistake I then replaced that firmware with the Official pacific digital firmware.I also used the automatic update manager that came with the dvd burner to update the firmware.
I wanted to know if pacific digital is a crappy dvd burner or if I screwed up the firmware by changing it three times.
I also wanted to know if it is possible to use another manufactures firmware which may be superior to pacific digital firmware to improve its performance.
I have a pacific digital (BTC drw-1008IM) 8x speed dual format-/+ dvd burner.

Thank you

try using the btc firmware