Thanks for your help, I had a feeling that was the case. Am I correct in thinking that it is the priority order in the left pane that is important, not the actual order I download the mods, when following the STEP Guide? Using the very helpful list at the beginning of this thread I was able to fix my STEP Extended issue. I was being given the opportunity to install the Core patch though but aMidian_ContextAddon.esp is also, according to the list, need for Core. So should that esp be in the core list? I really should not try to add mods after 9.00pm :).