Reduce volume of keyclick noise

I like having the keyclick sound turned on, for some reason I type more accurately with it... but I find the volume of the sound too loud. Is there some way to reduce the volume of that sound? Jailbroken iPhone 3G... thanks

edit: I figured it out, if anyone else is interested...

1. SSH into your iPhone, to /system/library/audio/uisounds
2. move the file "tock.caf" to your computer... make a duplicate of it to back up
3. open the file in an audio editor (I used Audacity), and lower the gain of the file
4. Export it back to your desktop (making sure it's still a .caf file)
5. re-name the file "tock.caf"
6. SSH the file back into the "uisounds" directory, overwriting the original file
7. Reboot iPhone for good measure