Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
OP:

Instead of fooling with terminal, try this FREE utility, "Install Disk Creator":
It should create the bootable installer with a few clicks of the mouse button.

Please get back to us if it works.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.