Wav files can be played through native Communicator plug-in, LiveAudio.
Make sure you have it installed by going to Help|About plug-ins.
Make sure the file npaudio.dll is in the plug-in directory.
Make sure the Edit|Preferences|Navigator|Applications has settings for WAV.
If there is not one create a new one to look like this:
Description: Wav audio
Extension: WAV
MIME: audio/wav
Application: plugin

Removing AOL Instant Messenger

1.On the AIM sign-on screen, click the Setup button
2.Select the Misc tab
3.Uncheck "Start Netscape AIM when Windows starts."
This way, the Instant Messenger program will not load unless you explicitly launch it.
To completely remove it (unsupported):
For Windows 95/98 and Windows NT:
In Windows Explorer: Remove AIM from the Personal Bookmark folder.
Delete launch.aim from every user profile.
In "...Communicator\Program\Aim", delete the "AIM" folder and the subfolder "sounds" and all contents.
Run Regedit: Edit | Find - type AIM. Remove all references.
Edit | Find - type in AOL. Remove all references to AIM only.
Restart your computer.
On Win16, AIM files are listed under PROGRAM.
For Macintosh:

In your Macintosh's System folder:
Remove the "PromoLauncher" alias from your Startup Items folder. (This will eliminate the "Sign Up for Netscape AOL Instant Messenger" dialogs upon startup.)
Remove the "AIM Menu" extension from your Extensions folder. (This will eliminate the AIM menu from the upper-right hand corner of your menu bar.)
You may also wish to remove the "IdleTime" extension, which the AIM installer places in your Extensions folder.
Since you may have other applications that depend upon this extension, such as UserLand Software's Frontier scripting system, we recommend using caution in removing it.
In your Netscape Navigator (or Netscape Communicator) folder: Remove the "Netscape AOL Instant Messenger" folder. (This will eliminate the actual AIM application and associated data files from your Macintosh.)
Configuring Communicator to Dial Out

1.Click the Start button and select Settings, then Control Panel.
2.In Control Panel, double-click the Internet icon and select the Connection tab.
3.Place a check in the box for "Dial whenever a internet connection is needed".
4.Make sure the path below "Use the following Dial-Up connection" is pointed to the correct connection file.

Enabling JavaScript

1.Go to the Edit menu and select Preferences.
2.Click Advanced from the left side of the screen.
3.Check the box marked Enable JavaScript (you can optionally enable JavaScript for Mail and News in version 4.5 and higher).
4.Click OK.
Changing the Homepage

1.From the Edit menu, select Preferences.
2.Highlight Navigator.
3.Under "Navigator starts with", select "Home page".
4.Next to Location, type in the URL (web address) of the page you want the browser to start with.
Disabling the Quality Feedback Agent Windows

1.From the Windows Start menu, choose Programs, Netscape Communicator, UtilitiesFr, Netscape Quality Feedback Agent. The Netscape Quality Feedback Agent window will open.
2.Go to the Settings menu and select Turn Agent Off.
Macintosh

1.Open the Hard drive, then open the Netscape Communicator folder.
2.In the Netscape Communicator folder, locate the Talkback folder.
3.Drag it to a location outside of the Netscape Communicator folder

Using Outlook for Mail through Communicator

Yes, it is possible to use Netscape Communicator as your default browser yet use a mail client other than Netscape Messenger for mail.
To prevent Messenger from being the default email client:
1.Go to the Edit menu and choose Preferences, Mail and Newsgroups.
2.Deselect the option to use Netscape Messenger from Mapi-based applications.
Creating a New Shortcut for Communicator

By making a shortcut to the netscape.exe file on your hard drive, you can make a shortcut that launches Communicator. Use the windows Find command to locate netscape.exe.
By default it is in the c:\program files\netscape\communicator\program\ directory:
1.Click the Start button and choose Find, Files or Folders.
2.Type netscape.exe on the Named line and click Find Now.
3.Once the file is found, right-click it and choose Create Shortcut.
4.Create the Shortcut on your desktop.
Drag and drop the shortcut onto the Start button and you'll be able to add it to your Start menu as well.