First advice is that LEDs need a resistor to limit their current. You can't get them to work by starting with the same voltage they need and just letting them take what they need...unless CREE LEDs are designed with their own resistors. The schematic for a resistor is very simple. I think you can do that for your self. For instance, 4 batteries, 1.5 volts extra, 2/3 of an amp, 2.25 ohms. Buy 2.2 ohms, 2 watts.
as for the rest of your request, you can usually get some help on this site, but getting somebody to just design the whole thing for you is not likely to get results.