I'm also having trouble with my initial installation of STEP Core. Specifically with figuring out how to install SKSE with MO. After I follow the directions how do I launch Skyrim with SKSE? I assume I need to add the skse.exe to the MO "modify executables". Is this correct? Do I then always launch skyrim with the SKSE executable? Do i really NOT need to install SKSE with the normal installer package from the official site? Thanks for the help! I really appreciate it!