public static final Block ??? = (new ???(212,ModLoader.addOverride("/terrain.png", "/Blocks/???.png")).setHardness(0.5F).setStepSound(Block.soundGrassFootstep).setResistance(0.5F)                        .set BlockName(" "));




//in your mod
 ModLoader.registerBlock(???);
ModLoader.addName(name you set above"what u 2ant the ingame name to be");






//section 3 in your block's class
package net.minecraft.src;

import java.util.Random;

public class ??? extends Block
{
    public ???(int par1, int par2)
    {
        super(par1, par2, Material.rock);
        this.setCreativeTab(CreativeTabs.tabBlock);
    }
}