Hi there, I had problems with my new pc's burner only burning in + format and my portable dvd player only playing in - (minus). Well I took some advice I got and went and bought a pioneer DVR 108. I have now installed this. The problem that I have even now is when I burn a dvd in minus format my portable dvd player is still not picking it up! All I am getting is a "no valid disc" message yet the disc plays fine on my main player and my pc. I am using Sonic record now! version 7 (which came already installed on the pc) to burn the discs. And have used 2 different makes of disc infinities and datawrite yellow's). The crazy thing is I have several dvd-r's that I have bought from a local market that play fine on my portable player. So it's got to be something i'm doing wrong. It may be worth pointing out I have also installed Nero 6 but when I have added files and clicked "next" the "burn" tabe on the final page is greyed out not giving me the option to burn. Being a complete novice at this burning lark it could be something simple that I am doing or not doing. Hope someone can help, Thanks, Pete.