Before starting you need to have USB stick (1 Gb capacity or bigger) and a possibility to boot up from it. Also please realize that NOBODY IS RESPONSIBLE FOR ANY FAULTS AND YOU WILL DO IT ON YOUR OWN RISK! 1. Download modded BIOS | mirror 1 | mirror 2 | mirror 3 | mirror 4 2. Download original BIOS from dell.com 3. Use this tutorial to make pure DOS bootable USB stick (Thanks Tito for the new link) 4. Extract bios.gz from modded BIOS rar archive and copy it with original BIOS file M1330A15.EXE to your already formatted DOS bootable USB. 5. Boot from USB stick and write command M1330A15 /readgzfile, press "y" and follow instructions until your system reboot. That is it Now you have flashed BIOS with SLIC 2.1 table Big UP to BBSC for modded BIOS !