Can anyone help me in understanding the mirror plugin? I can't figure out how to precisely place the mirrored selection. I can't seem to find a good tutorial online or with the plugin.

I am having a hard time installing plugins. I am working with SU8 on a Mac. I am downloading the plugins from Sketchucation and putting them here /Library/Application Support/Google SketchUp 8/SketchUp/plugins. After installation I am completely closing Sketchup and reopening, but they just aren't there. I have only had success with Curviloft and Round Corners. I have tried to install OSCoolean, SoapSkin, Workplane and others with no success. I have looked under every menu item and can't find them. What am I doing wrong? I am moving everything that is downloaded into the above mentioned file. Should I be opening and extracting something? The files don't appear to be zipped. Please Help

I'm sure this question has been asked and answered, but I can't seem to find it. How can I lock (pin, dock what ever the proper verb is) toolbars, specifically plugin toolbars so the window looks the same every time I open Sketchup? They just seem to float and don't move when I move the entire window around or they get hidden when I move various windows around. How can I get it so they will show up in the same place every time I open Sketchup? I am working on a Mac and the free version of SU 8.