I started this thread not because I wanted an arguement or something. I just wanted to understanding BIOS modding methods. Originally I wanted to Mod my BIOS Aspire 4530, I wanted a SLIC Overwriting Mod. 1)Find OEM Vendor ID, Replace 2)Find PubKey, Replace 3)Find Marker, Replace However Justinkb suggested SLAC modding. Adding a new ACPI Module then disable the original SLIC Tables by marking it as SLAC. My own assumptions was that introducing more modules can cause more issues than just overwriting it. Since SLIC although from different vendors are identical in length hence replacing them should be safer. Any Opinions from other experts out there?