Use the HerrieStock firmware.
I used both, (v1.08 HP 1.27, and now HerrieStock), but I found HerrieStock better.
I use Traxdata, Ridata and Ritek (original Ritek made by Ritek...) DVD-s.
With HS firmware I get very good results, v1.08 was not so good for me.
(Sorry for my bad English...)