Re: LG DVD/CD-Recoder
You are using a Double Layer DVD which only supports upto 2,4x burn speed. Nero only shows the max speed of the recordable media you are using, No need to update Firmware or DMA settings, just buy some DVD media with better speed (8x or 16x)
WitchDr, Verbatim (<< link) offers upto 16x recordable medium. A 25 DVD+R Spindel costs 17,99 € where I live.
EDIT: Verbatim also offers DVD+R DL with 6x burn speed