Copper

Copper ore is added by several mods such as Thermal Expansion, RedPower 2, IndustrialCraft 2, Tinker's Construct and Forestry. Copper Ingots are used in many important crafting recipes such as Bronze.

Processing
Copper ore can be smelted using any smelting machine or furnace

To double or even triple your ore output you will need to use one of the processing machines. The dust from these machines will need to be smelted in a smelting machine or furnace.

Copper can be made into Ingots or Dust after which point it can be converted into Nuggets or Storage Blocks

World Generation
Ore world generation is controlled in the config files of the mods that add it. To have only one type of an ore generated turn off the ore generation in the config files for all but 1 of the mods. Thermal Expansion and CoFH Core offer you the ability to tweak the spawn rate of all modded and vanilla ores.