Thanks, I've edited the things you pointed out, except that last part about the LOTRO Lua manager because I didn't know about that one untill you mentioned it (I've only just started using plugins so I don't have much experience with them yet...). If you explain what you wanted to see about it, I'll gladly put it in the guide (with credit ofc.)
No need for credit! I would suggest adding something like:
If you choose not to use the plugin compendium, after following the directions to unzip each plugin into the appropriate folder, you can use LotRO's Lua Manager (Main Menu -> System -> Lua Manager) to choose which plugins to automatically load for your individual characters. You can also adjust the plugin options in this menu.