ROM Hack OAM in Pokemon Conquest translation

[gh78]

Hey guys
I do a french translation of Pokémon Conquest (topics of project : here and here
I have problem with the translation of graphics : no problem to translate in the ncgr (file1 and file3) but in the file2 (ncer), impossible to add OAM : the new rom doesn't work with flashcard (I've test with r4 (www.r4i-sdhc.com) and DSTwo), but work with DesMume :?:?
I use Tinke (thanks to pleonex), and I've try to edit manually with an hexa editor, but...

So question : it's possible to add/remove OAM in this rom, or not ? If yes, how ?
Thanks^^

gh78

p.s : sorry to my bad english