Just spotted this bit of Info at Futuremark's Forum posted by jfitzw!

I dont know about any file that will change it other than bootvis, which never worked for me. one guarunteed way to get faster boots, is to change the prefetch options. do this

start > run > type regedit > navigate to HKEY_LOCAL_MACHINE > SYSTEM > Current control set > Control > Session Manager > Memory Management > Prefetch Parameters. change the value in EnablePrefetcher from 3 to 5. reboot and watch the faster speed.