. The first thing is to decode the .flac files into .wav files. After
that's done, you'll encode the .wav files into .mp3's.
Open Winamp and select Options and then Preferences…
(note: if you're using the (classic version) skin, open the Winamp
Preferences by clicking the Control and p
keys on your keyboard)

Select Output from the Plug-ins section
of the left window, and then select Nullsoft Disk Writer.
Click Configure.

Click the Directory: button so you can choose a location
to save the .wav files

Navigate to the folder you want to save the .wav files in. I usually
save them in the same folder as the .flac files.

Click OK to return to the Preferences window, and
then Close to return to Winamp. Now select File
-> Play file and navigate to the folder with your .flac
files. Select all of the .flac files by single-clicking
the first file, holding down the Shift key on your keyboard,
and then single-clicking the last file. When all of the files are selected,
click Open

Press the Play button. Winamp will now decode the .flac
files and turn them into .wav files. It typically takes about 20 seconds
to convert a 5 minute song, but this depends on how fast your PC is.
Once Winamp is done decoding the files, make
sure to set the Plug-ins -> Output
back to DirectSound output, or the next
time you try to play a file using Winamp, it will decode that file instead.
Check to make sure all of the .wav files were created.
