okay, this little programme should do the trick.
You only have to download and unzip the file into a folder. Start the programme (you may want to make a short cut on your desktop) and click [options] -> [recording control]. Select Wave/MP3 (probably at the far right of the window).
go to [options] -> [programme options] -> [recording] to chose the appropriate settings (mp3 quality, stereo/mono, etc)
If you now start your streaming radio and click record (like in the good old days...), an mp3 file will be created. You'll have to manually push the buttons for start and finish.
simple comme bonjour, non? Try it, read the help