Yes, my Pick N Mix Compendium doesn't activate those Custom Mod Options, so you would need William Howard's mod to do so when using CSD versions that require DLL enhancement.
Yep, in fact, I installed your version of P'n'M Compendium and the "all-in-one" pack by whoward (with the dll mod + CSD + Civ4 Diplo), but didn't delete some files as explained in the installation instructions. I did it and now everything seems to be working fine, so I think you won't have to do anything to make your mod compatible with these since it seems to be already the case !