Here is brief answer from your question in the Request thread. Don't use PBE to build it. You don't need to rebuild the whole rom, it will change too much; more than you want for this type of mod anyway. Download the tools from the Levono thread. Copy your new SLIC file to the SLIC folder from the tools. Since you are replacing the existing SLIC it needs to be compressed. The tool you use to dump your BIOS will show the structure of what is compressed or not. PBE, look at the ROM.SCR. In your case ACPI08.ROM is compressed, no -X or -Compress:NO. In the SLIC folder, edit the SLIC.SCR file and change COMPRESS NONE to COMPRESS LZINT. Make sure your filenames on disk match what is in the SLIC.SCR file. Remove the SLIC.MOD from folder if present. Run the commands from the bat script manually so you see what is going on. When you are done, you will have a compressed ACPI file. Open the SLIC.MOD and your BIOS file in a Hex edit program to swap out the _A08 mod (ACPI08.ROM). Take note of the start bytes F800. Fix your checksums and save the ROM. No need to rebuild it with PBE. add: If you were rebuilding with PBE. With this type of mod, you rename the updated SLIC as it is (no compressing as above) to ACPI08.ROM - should be same byte size. No changes needed to the ROM.SCR file. Build it. If errors with SLIC, its the checksum byte of the SLIC file. If you are using one of the 2.2.x builds I can send you a patch to enable building the rom without making a change.