[ALUG] Xandros <> GPL

Does anybody know anything about Xandros, I am looking into it on request but I found this in the FAQ Will the desktop be based on KDE or GNOME? Xandros Desktop uses a Xandros enhanced version of KDE. My question is have they actually modified KDE itself, or just reconfigured it and perhaps completely replaced some of the KDE applications. I can't find mention of the source being available anywhere so I am hoping the latter.