The FX presets are contained in the file
in the folder
C:\Documents and settings\[username]\Application Data\Audition\2.0\
where [username] is your Windows log-in user name.
You can obtain XML editors but they are rather specialist in application. Fortunately, this file can be edited in a text editor like Textpad or Notepad. The file has only two lines with no line breaks. The FFT presets are at the end of a very very long line! In practice, you can add line breaks which are ignored. To add the RIAA presets becomes easy.
The following shows the end of the file with the additional data separated by line breaks:
</KeyVal><KeyVal Key=“Item8” Type=“string”>Kill The