Unpacking a .DAT file from Nintendo DS game [Castlevania LD_font_u12.dat]

[BrudasekPL]

Hi, I would like to unpack those 2 files with a .DAT extension. I extracted them from Castlevania - Dawn of Sorrow(it's a game on NDS), because I want to apply English font to Japanese version of the game(I want to do translation). The problem is that I cannot open them. Can anybody give them a try?

https://mega.nz/#F!lVsh0Jxa!clNeFlQ-1rjO_sHSI9xugg

[lupus]

Jap version may already has eng font