For NameBrand: Since acpi table already has a slic let's try pubkey/marker method. It might not work but it's usually safe to try and is nice dynamic mod when it works. - Motherboard Manufacter And Model : EVGA X58 SLI - Bios Revision : SZ27 - Bios Type : AWARD Asus slic added: Edit: link removed--awdflash invalid license error. Method used: pubkey/marker
Awdflash says that with my motherboard too if the key/marker isn't already in current bios. The built in EZ Flash utility doesn't care though so that's a workaround if you have it available.
There are some more things that could be tried such as renaming the fake slic or replacing it with a real one. I have to get going but I'm sure someone will have another mod for you to try before too long.