BBC radio streams not working

[Reg]

Hi

I'm not a computer whizz. I use Minim for selecting and running my Naim Unitiqute2. Minim to my mind is the best of the UpnP devices I've found. I have version 0.8.3 and Streamer 0.5.2
BUT.... it is not the easiest to navigate for the "ordinary user. I'd like to use it to get the Radio3 320 feed. I've read this thread from top to bottom. Sorry this is going to be basic. Where do I add the URL Playlists files you've set out? Do I create a folder called say Radio and put them in there? In what form? As a Notepad file for example or what? And I've tried to add the aac;L16 to System in Minim but it wants a transcoder. No success. ????????
Is it possible to set this out in very basic terms for non specialists like me please?

Many thanks