If you have problem with the firmware 3.02 hack from DYTER (The french hack of the firmware) , like the crash o freese problem re install the official firmware from liteon that with fix the problem
that work for me.
Now my player don't crash and i can put several movies on a DVD +R with subtitles it work perfect.

You can download the official firmware here
http://www.liteonit.com.tw/DC/english/download/2002.htm