Nozzer, thanks for the heads up on name convention (duh) :-) Anyway, problem fixed! I did two things: -what you suggested -then this little tidbit about skse and mod organizer shown here: https://[General] ClearInvalidRegistrations=1 [Memory] DefaultHeapInitialAllocMB=768 ScrapHeapSizeMB=256 I was always able to run skse as an executable from MO. The issue was, I started STEP using NMM. After it didn't work, I installed MO and merged all the mods into it and started the installation process all over again. BUT, I didn't revisit part 2C in the guide, so I totally missed the specific instructions for installing SKSE scripts into the MO folder. Anyway, thanks for the help! I was able to enter Skyrim form Helgen Keep.