does this look alright for getting 12V, 5V, and 3.3V?

if this works other people could do the same thing but with 12V batteries.
pg.8 if this helps anyone get to the voltage they need
http://focus.ti.com/lit/ds/symlink/pth08000w.pdf" onclick="window.open(this.href);return false;
edit: I got all the right voltages when plugged into the wall but when it came down to powering the dreamcast it was just too weak.
