How to adjust recording speed of sohw 1633s?

Is it possible to adjust this lite-on (sohw 1633s) dvd recorder to reduce the recording speed to 12x when using Intervideo dvd copy? It won’t record properly at 16x despte update of firmware. I got to see the trailers on the dvd which had copied but quality completely broke up on the main feature. Maybe reducing the speed would help but I don’t know how to set the max??

You could always use DVD Shrink in combination with DVD Decrypter or ImgBurn. More flexibility, better quality, and free. And changing burn speeds won’t be an issue (I’m assuming it can be done with Intervideo DVD Copy as well, but…).