i've been in bed for like 1.5 hours
try inserting the palette 0 image i gave you really quickly, i guess. use irfanview to index (decrease to 16 colors) and then round each color to a multiple of 8 and then export the palette as a file. convert said palette file to an advancemap palette file using some tool, and then load up advancemap. load up the image, load up the palette, write palette to rom, save tiles, bam.