S17 is very slow on my 800 MHz PowerBook. I would guess the redish background or the shaders are responsible. FPS is 3-10. Really slow.

What video card does it have and is the powerbook a G3 or G4?
How much video memory does the powerbook have?

AGP RageM7 (Rage Mobility 7500). 32MB VRAM. PowerBook G4, 800 Mhz. Most other sectors are ok.