How to Use Dashboard Plugins

Hello!

Sorry for the elementary questions..... I am just learning so please excuse me.

I have read the installation instructions, as well as, the forums and still have a few questions as to how to get these up and operating.

What I am gathering is that you have to go into the coding to first, activate the widget(s) so it displays under Appearance> widgets. Also, you must edit the coding for placement on the dashboard?

How exactly do I use the widget order plugin to get a widget to appear under Appearance> widgets?
Where do I go to utilize the custom dashboard plugin? How do I use it?
Same for Dashboard Feeds... Where do I locate it? How do I use it?

All your help is so greatly appreciated!!!!

Thank You!