Yeah, 10 GFX files, named FG1, FG2, BG1, FG3, BG2, BG3, SP1, SP2, SP3 and SP4. As you can see, 4 are for sprites so its more like 6. That's alot compared to the 4 before lm 1.7whatever. Chances are, you will have more than enough space for GFX.
shows 2 gfx files per page, and
will list them all.