This conversion is really easy and miscellaneous because you can install game without DVD 2 for favorite languages.
DVD1
Label: whatever you want (i called it LOTRBFME2_DVD1)
Files:
All files except:
0es_compressed.zip (move it to DVD2)
0fr-fr_compressed.zip (move it to DVD2)
0it_compressed.zip (move it to DVD2)
+ create new txt files for those files exact names:
add this line to txt files:
es_filelist.txt
Code:
2,1,Support\es\leeme.txt
fr-fr_filelist.txt
Code:
2,1,Support\fr-fr\lisezMoi.txt
it_filelist.txt
Code:
2,1,Support\it\Leggimi.txt
(Blue "
2" means DVD2)
Note: You can add also more files and custom files eg. fixed game.dat

Eg. Leggimi.txt will be copied to:
<GamePath>\Support\it\Leggimi.txt
<GamePath> (depends on language) usually C:\Program Files\Electronic Arts\The Battle for Middle-earth (tm) II\
This will cause if you install game in Spanish, French, Italian, installer ask you insert DVD2 and will automatically copy 0**_compressed.zip archive + files in **_filelist.txt
DVD2
Label: whatever you want (i called it LOTRBFME2_DVD2)
Files:
(you can copy whole "Support" folder or at least files (eg. "Support\fr-fr\lisezMoi.txt") you need from it_filelist.txt, fr-fr_filelist.txt, es_filelist.txt)
Support\
0es_compressed.zip
0fr-fr_compressed.zip
0it_compressed.zip
LotRIcon.ico (if you do not have you can download it here:
BFME2 [2xDVD5].rar)
autorun.inf
Code:
[autorun]
Icon=LotRIcon.ico
Name=The Battle for Middle-earth II
[Special]
Disk=2
ProductGuiID={2A9F95AB-65A3-432c-8631-B8BC5BF7477A}
Install sequence:
DVD1 (only) (for German, Swedish, Dutch, English, Polish, Norwegian)
DVD1 - DVD2 - DVD1 (for Spanish, French, Italian)
DVD1 4374 MB (101 MB free)
DVD2 1308 MB (3167 MB free) (you ca add here your favorite maps, mods, tools, trainers etc.

a lot of space
Note: You can do it similar if you want Spanish, French, Italian on DVD1, just create de_filelist.txt and move "0de_compressed.zip" to DVD2 and one of 0es_compressed.zip , 0fr-fr_compressed.zip , 0it_compressed.zip to DVD1.