NikeiPodSportsKit
From iPodLinux
I examined the lates firmware of iPod nano-s (Firmware-14.5.2 iPod-Update-2006-06-28). It contains the voice (wav format) for Nike+ tools (when use the Nike+ sport kit and linked iPod with the censor, you press the center button you can hear male/female voice instruction e.g. "100 kilometers to go" etc.).
This wav files contains in the firmware. It is 16MB FAT16 filesystem that you can mount it:
dd if=Firmware-14.5.2 of=FAT.img bs=512 count=32768 skip=10895
double-clicked the FAT.img the Mac mounting the filesystem (or "mount -t vfat -o loop FAT.img /mnt/" on linux). The directory three like this:
Resources\
TrainerTemplate\
Voices\
...
sports_male_0000_voi\
...
ten_calories_to_go.wav
You can change the "ten_calories_to_go.wav" with your mother language or self voice. After modification you can umount (on Mac click eject, on linux use umount). The FAT16.img need write back to Firmware.