Answer 1: All the scripts from every mod you ever downloaded (providing it had scripts) goes into the script folder. The only way to see which is your is by checking in the CK Answer 2: Yes, all scripts go there so it will then be jumbled up Answer 3: Work on one project at a time. A simple trick, which is great for beginners, is to have a fresh install so that only your created stuff is there. Once you are done with your mod you can go to your script folder and just rename from "Scripts" to something like "scripts_MyMod01" This only really works if just your scripts were in the script folder and it now means that they won't load in game but It keeps it clean. This trick also works for anything not just scripts, you could do it with things like meshes too. Or once your mod is done just generate a BSA via the CK which will automaticly pack only your stuff for the mod into a neat little bundle! Hope this helps :)