I'm a bit of a novice to all of this, so your patience assistance would be appreciated. I have an LG HL-DT-ST DVDRRW GWA-4161B and I use DVD Decrypter to back up my DVD's. I want to be able to back-up some of my 2 disc DVD's onto a dual-layer but my first few attepts have not been successful. Any advice / directions? Thank you.