My RPI1 (512mb) the installer stoppet at 10%, and when i try’d again with "gpu_mem=32" the installer seems to work now… at least it’s at 60% now ;-).
EDIT:
install done, but after some time, kodi stalls and keyboard don’t work(numlock)
installed on SD card… will try rasbian OS to see if that pi is broken(old one).