1. Run MP3Producer
Click the Start button in the Startup menu and choose Programs > MP3Producer. The MP3Producer main window will be displayed.
2. Set WAV to MP3 mode
Use Main Menu: Mode or click on mode icon in Info Bar. In the right corner of Info Bar appears the following mode icon: 
3. Add WAV files
Add WAV files which you want to encode into Track List. Use Directory Tree or press button "Open" in Main Bar.
4. Select an output directory
Select directory where encoded MP3 files will be saved. Press button "Output" in Main Bar or use Main Menu: Action > Select Output Directory... This directory is shown in Info Bar.
5. Enter files info
If you wish to use ID3 tag check "Write ID3v1 tag into MP3 files" and/or "Write ID3v2 tag into MP3 files" on "ID3 Tag" tab page and fill out Artist, Album, Year, Genre and other fields. Song title can be edited in column "Title" in Track List.
If you have got Internet connection you are able to use function "Get CD info from FreeDB" (press button "FreeDB" in Main Bar or use Main Menu: Action > Get CD Info from FreeDB...).
6. Specify filenames format
Use "Filename" tab page to specify the MP3 filenames format, the type and format of playlist.
7. Select MP3 Settings
Set the options for output MP3 files on "MP3 Settings" tab page. If you do not want to understand subtleties, you should use Presets ("CD" is recommended).
Hint: Specify the settings concerning the course of the copying and encoding processes. Press "Settings" button in Main Bar.
6. Press the Start button
Now you can run encoding process. Press the button "Start" in Main Bar. You can see information about encoding process in column "Status" of Track list.