Hi Jake,
As per your post I have religiously followed your Dell Latitude/Inspiron El Capitan Clover Guide 3 times now but can only get as far as Installation step 3.
I am reasonably confident of Preparation steps 1 through to 29. I downloaded Clover boot pack E7440.zip (which contained ACPI, Kexts, and Config.plist) and renamed it EFI. I then replaced the EFI folder in the root of the hidden EFI partition (which contained ACPI, Kexts, Config.plist, Boot, Clover and Clover_install_log.txt) with the EFI (E7440) renamed folder - leaving the EFI hidden partition EFI folder with the replaced ACPI, Kexts and Config.plist folders/file.
I then completed Installation steps 1 to 3 and on boot up got a black screen with the error message - Invalid Partition Table. I started all over again from Steps !;! through to 2:3 with the same error message. On the third time through at step 1:29 I left the Boot, Kexts, and Config.plist folders/file on the EFI folder on the hidden EFI partition and only replaced the ACPI, Kexts, and Config.plist folders/file. On booting up I got the Clover boot screen this time (no error message) and clicked Install OS X El Capitan. I got a black screen with the white apple logo for circa half a minute and then got returned back to the Clover boot screen. On clicking install again it just went round in circles.
Clearly I am doing something wrong but not sure what. Please can you advise how I diagnose the problem and hopefully move forwards. And why do I get an error message when I follow the guide by completely replacing EFI but am able to boot to the clover screen if I only partially replace EFI??