I have modded the BIOS for my ASUS P6T Deluxe V2 board with little confusion on my part. Now I'd like to mod the UEFI BIOS for an ASUS P8Z77-V board. Phoenix tool v2.14: When I load a fresh d/l'd BIOS v1805 I get Info popups: 1. Recovery file names: Z77VB.CAP; APTC022.ROM 2. Complete SLIC (2.0) (AMI OEMSLIC ) (x1) Then, I load the ASUS SLIC file (ASUS.BIN) pointed to by Phoenix tool from within its folder. Then, I load the ASUS SLP file (ASUS.txt) again pointed to from within its folder. Then I load the certificate ASUS-_ASUS_-2.1.XRM-MS from the file: SLIC 2.1 BINS 1-31-2011.7z. Or, I load the same ASUS.xrm-ms file that I used to activate Win7 on my ASUS P6T Deluxe V2 board. In either case, I get the following info popup: Complete SLIC (2.0) (AMI OEMSLIC ) does not match certificate (x1): ASUS.BIN Matches certificate. I am really having trouble understanding how the mod of a UEFI BIOS is accomplished. But, I think that Phoenix tool is telling me that I need an ASUS SLIC 2.1 for my board. Or, I need a certificate and BIN file to match the SLIC file. Can anyone give me some guidance on this?