I read at Betanews that the interface of Communicator 5.0 can be customized using skins. cool!
Following the trend of many recent applications, namely digital audio players, Netscape Communicator 5.0 will support customization of its interface, using ‘skins.’ The Mozilla team is currently working on the feature and is expected to have it completed for the final release. At the moment, the user must put the images in the correct folder and edit the preferences file manually. However, the feature will eventually be an option within Navigator’s preferences dialog and skins will function as a single file, much like Winamp does with WSZ.