Rename Audio file with XML

Hello Guys... i having a bunch of 36000 audio files name like that... M123456_TITLE.WAV (SND OR MP3)
And i would like to use the XML file named exactly the same as .XML

Could you help with the Conversion Action bouton to set it.

1978 0 M000001

CATEGORIES/LIBRAIRIE MUSICALE CDI/MUSIQUE CMI 1

HEAVEN KNOWS DONNA SUMMER,BROOKLYN DREAMS LIVE AND MORE 18058 0 193184 0 0 -2571 193184

I don't really understand:
Is it that you have data in an XML file and you want to import that data into tag fields?
And

is the contents of the XML file?

yes exactly!

i want the metadata in the audio file...
At the moment it's like that
M000001_HEAVEN KNOWS.wav
But with the Metadata in it.... i want to change it like that
DONNA SUMMER,BROOKLYN DREAMS LIVE AND MORE - HEAVEN KNOWS.wav

You understand?

AFAI understand XML files, the contents of these files is structured with markups.
So, you would have to look at the XML file and strip away these markups, import the data into a user-defined or standard field and then use the contents of this field to perform a Convert>Tag-Filename or the corresponding action Format value for _FILENAME:

second option!! After that i could use the MusicBrainz stuff to fill it once the name is ok

What is the source of the details in your XML file? Why not avoid the two steps required for this and directly enter or import the data into mp3tag from the source?

With the examples you have shown I don't see how this can be easily automated until you have something concrete in the filename or metadata itself to initiate a search.