texture.bin is converted in an include file by using the provided makefile:

Code:
set PATH=%PATH%;c:\fpc4nds\bin\arm-nds
make OS_TARGET=nds CPU_TARGET=arm BINUTILSPREFIX=arm-eabi- PP=ppcarm.exe
I don't know if "make" can be called by Lazarus; however you could call "make" the very first time, in order to generate the inc files, then use Lazarus as usual