You need the following :
TwonkyVision Winamp Plugin v1.04
http://www.twonkyvision.com/UPnP/WinampMediaServerPlugin-1-0-4.zip
SHOUTcast WIN32 Console/GUI server v1.9.4
http://www.shoutcast.com/downloads/sc1-9-4/shoutcast-1-9-4-windows.exe
SHOUTcast DSP Plug-In for Winamp 2.x
http://www.shoutcast.com/downloads/shoutcast-dsp-1-8-2b-windows.exe
Tara's Real Audio Input Plugin v1.0.3b for Winamp
http://www.musiclivesonline.com/software/downloads/Tara_v1.0.3b.exe
RealPlayer, v8 or higher.
Winamp v2.9x or v5.x, AKAIK the plugins don't work with Winamp 3.x.
Install all the software and start "sc_serv.exe" from the SHOUTcast
installation folder. If you see an error message like the one below
you need to change the portbase in "sc_serv.ini" to another port, try
incrementing the number to 8001 etc. until you get the server
running. It's a good idea to start the server from a DOS windows so
you can see any error messages, if you just start the exe from the
windows explorer and the port is blocked, the window will close
automatically, you won't be able to see the error messages.
[main] error opening client socket! FATAL ERROR! Some other
process is using this port!
When you've got the SHOUTcast server running, start Winamp.
Go to Preferences, DSP/Effect, select or double-click SHOUTcast
Source for Winamp v1.8.0 to bring up the SHOUTcast Source window.
Go to Output, check Connect At Startup, change the port if you had
problems with the default port 8000, go to Yellowpages, deselect Make
this server public (to stop the plugin trying to register itself with
SHOUTcast's directory), go to Encoder, select required Encoder
Bitrate Settings (I chose 96kbps, 44.1kHz, Stereo). Close Winamp
Preferences, the SHOUTcast Source window should still be visible.
Create a new playlist in Winamp with your chosen name, e.g. SHOUTcast
Local Relay, then choose play a URL from the file menu and enter
http://localhost:8000 (adjust the port number again if the SHOUTcast
server isn't running on the default port 8000). Winamp will try to
connect to this "stream", you'll see an error message that it could
not connect. Ignore this. Right click on this entry in the playlist
editor and choose send to the playlist you created before.
The entry in your playlist will be called http://localhost:8000, you
can change this by opening the corresponding m3u file in
Winamp\Plugins\ml (assuming Winamp 5.x) in a text editor and changing
the text after #EXTINF:-1, to your prefered more meaningful name.
This will show up later on the MP101.
All that remains is to connect to a RealAudio stream, e.g. BBC Radio 7
rtsp://rmlivev8.bbc.net.uk/farm/*/ev7/live24/bbc7/live/bbc7_dsat_g2.ra
Now connect your MP101 to the TwonkyVision Media Server and browse
the playlist and play your RealAudio stream in MP3.
Hope this helps.