ok, it's work now. thanks again...
@nodeselect
Rename FILEINFO TO="{mp3track}%{mp3title}"
@script vbscript
Option Explicit
Dim DOpusRTPath
DOpusRTPath = "C:\Program Files\GPSoftware\Directory Opus\dopusrt.exe"
Dim Shell
Set Shell = CreateObject("WScript.Shell")
Function Rename_GetNewName ( strFileName, strFilePath, fIsFolder, strOldName, ByRef strNewName )
Dim re, strCommand, track, titre, path
Set re = new RegExp
re.Pattern = "^([0-9]*) - (.*)(\.mp3)"
track = re.Replace(strFileName, "$1")
titre = re.Replace(strFileName, "$2")
path = strFilePath & "\" & strFileName
strCommand = """" & DOpusRTPath & """ /cmd SetAttr """ & path & """ META ""track:" & track & """ ""title:" & titre & """"
Shell.Run strCommand,0,false
Dopus.OutputString "Commande : " & strCommand
strNewName = ""
End Function