The AMIBCP will open the 2004 but it lacks support for newer AMI V core bios and will not display all the strings correclty (the 5.0.2.0034 will show a bit more), you may try this:
[TOOL] UEFI Editor - BIOS/UEFI Modding / BIOS Modding Guides and Problems - Win-Raid Forum (level1techs.com)
or what SK just posted.