Ok I hope you understand everything
!!
You need The BigGui look around the forum or just search google. (used to open the music.big file and data.gob)
Also U should use the program DittyImporter.. (used to convert your mp3 to .asf)
Also a text editor should be used.
First search google to find the correct programs.
once set open your data.gob file located at (C:\Program Files\EA Sports\EA SPORTS Rugby 08\Data\data.gob) with
BigGui.
Find the file a31ccba307ab5bb8c53e91ebeba0bb90.xml. (This file is used to give the mp3 tags also the filename.)
Extract The File to a folder.
Use DittyImporter to Convert all your mp3 files to .asf to a folder.
Now open the Music.big file located at (C:\Program Files\EA Sports\EA SPORTS Rugby 08\Audio\music.big) with BigGui.
Delete all the files inside this file.
Now import all your music into (you converted to .asf ) the music.big file.
Now Remember the .xml file is kind of linked. U should change the filenames in the xml file to the same as in the music.big.
Also remember that the same amount of files should be in the music.big as in your .xml file strings or you will get an error at startup.
once u changed all like you want it just copy the .xml file into your (C:\Program Files\EA Sports\EA SPORTS Rugby 08\) folder.