I am pretty busy this week so I'm not sure I have the time to write a full guide but if you get stuck I'd be happy to help. Mainly just follow the dortania guide, before install make sure to disable cfglock through uefimod. (sparknotes are you dump your bios in windows, doesnt have to be an activated copy, then use biostool to search for the variable, then use opencore's uefimodtool or whatever its called to check the value of the variable to make sure its the right one then set it to the correct variable for disabled cfg. Repeat with any other options not provided in bios that exist in the bios dump.) That's really the only tricky step, Dell just renamed one of their bios options confusing me and getting me stuck for so long, "CPU XD" or something. Otherwise, a pretty easy machine to hack.