How to organize internet radio streams?

I would like to organize my internet radio streams by grouping them in folders. Something like:

Radio 1
Radio 2
Radio 3
Radio 4
<folder favorites user 1>
User 1 Favorite 1
User 1 Favorite 2
Etc.
<folder favorites user 2>
User 2 Favorite 1
User 2 Favorite 2
<theme 1>
Theme 1 favorite 1
Etc.
Etc.

Also:
- how do I get rid of the standard structure?
- how do I get a list of local stations directly, without first having to click on my city first?

Thanks in advance for the lhelp.