I am sorry about this question, but I bought this car DVD Dual XDVD8180 and when I installed it I unfortunately saw that I was not able to play 70% of my DVD that are Region 4!!!

Somebody know how to unlock it and make it region free??
Please......

Please send it to my email too if it is possilble: abelardo_o_gozador@hotmail.com

Thank you