Sorry for the lack of documentations, here are some quick instructions. I usually tweak the .bat files so DOS can find my gfx2gba.exe
For sprites, make sure all the animation frames are in a vertical stripe. Make sure the width of the bmp is the width of your sprite, and the height is a multiple of your sprite's height. Check out
explosion.bmp in the scripts directory for an example. Then I just run the following on a DOS command line. You should end up with 3 files (the original .bmp file, a .pal for palette and a .raw cotanining the sprite graphics data).
gfx2gba -p explosion.bmp.pal -t8 explosion.bmp
For tiled maps, you just create a bitmap of your map/background. Check out
map_examplescrn.bmp in the scripts directory for an example. Then I just run the following on a DOS command line. You should end up with 4 files (the original .bmp file, a .pal for palette, a .raw cotanining the tile graphics data, and a .map file containing the "map" of your background). You might want to check
mappy for creating maps (then export as bmp).
gfx2gba -m -p map_examplescrn.bmp.pal -t8 map_examplescrn.bmp
I didn't include any tools to do the sound convertions. I've been pointing people to
the PALib - Sound tutorial for some tools/instructions.
Have fun!
Waruwaru