Lexus ISF sound
I thought some may be interested in this. I converted a MP3 I got from Lexus that is an ISF starting up and revving.
I didn't use for the Spen but as the bootup sound instead. Thus the filed is called "PowerOn.ogg" If you want to use for the started, just add to the directory: system/media/audio/ui/SPR/ On a side note, I have no idea why there are so many PowerOn.ogg files on a our phone. But that's the directory that worked.
Of course, you need to be rooted, and use an appropriate file manager that can do root access. You'll need -rw-r--r-- permissions enabled.
If you're going to use for something else, just remain it appropriately.