Alright, this is off topic now but...
I have adb installed and at the command prompt typed adb and got a bunch of adb stuff.
I read a little of the ADB link from Abe21599 signature. I think I can use your command if the prompt is at c:/android/tools
OK, I tried this:
mount -o remount,rw -t yaffs2 /dev/block/mtdblock4 /system
adb push quiet.ogg /system/media/audio/notifications/quiet.ogg
I got a failed to copy ... permission denied.
Any ideas? If I try to push before the mount command, I get a Read only error.