[makkonen]

Yeah, there are keyboard definition files in the rootfs (/init.etc/keymaps), but I never figured out how to compile them, and I'm not sure you can remap home and back using that, anyway.

You could also look at arch/arm/mach-msm/board-htcraphael-navi.c and see if you can compile it with them remapped somewhere, but that's an even bigger job, unless you're already set up to compile the kernel.