I finally opened the TLCDCEmu project (Tuner List CD Changer Emulator) on sourceforge.net : http://tlcdcemu.sourceforge.net
There, you'll find version 0.2 of the Java version I'm using. More information on the website (see particularly the HowTo page)
So this is the last time I upload here a version containing the windows libs here (it's 199K and the limit is 200K anyway :-) ). Future versions will include only the classes and be available on sourceforge.
Please note that I finally switched to RxTx for all platforms, so if you installed the communications libs from Sun, well, you can throw them away and use RxTx ones instead (sorry slimmegane :-)), but the principle is the same if you're on Windows : a jar in the "classpath" (for example in the lib subdir), and a dll in the "path" (for example in the JRE's bin directory or windows\system32).
Also take a look at the screenshots on SourceForge :-)