Unable to install Flash add-on for Linux Lite Chromium browser

I'm also a newbie to Linux Lite (a variant of Ubuntu) & Chromium browser (but I use Chrome as my default Windows XP browser).  Every time I try to go to a site that requires Flash I get redirected to here

http://get.adobe.com/flashplayer/?no_redirect

Which option should I be using? 

I tried selecting "APT for Ubuntu 10.04+" then it says

External Protocol Request

Chromium needs to launch an external application to handle apt:links.  The link request is apt:adobe-flashplugin?channel=$istro-partner.

The following application will be launched if you accept this request:

xdg-open

If you did not initiate this request, it may represent an attempted attack on your system.  Unless you took explicit action to initiate this request, you should press Do Nothing.

When I tell it to go ahead I get 'Failed to open URI "apt:adobe-flashplugin?channel=$istro-partner". The specified location is not supported.'

How else do I get Flash installed????