Is there a way to give a stream a custom name (other than the one the stream provider defined)?

Sometimes there are streams that don't have a title defined (e.g. http://somafm-sc.streamguys.com:9000/), and it will just show up as the URL in the playlist.
Or, at other times, the names are more advertising than actual information...

When I try to change or add the title tag myself, I get an "Access Denied" error (since I guess it's trying to modify the date at the stream source).