Please help...

well have few questions.

1. i'am trying to make item to spawn entity. item and entity are already exist. for item i have copied most of the code from itemMobPlacer but for spawnCreature it uses int that is entity id from EntityList. So i can change it and spawn vanilla mobs. i can see two ways of solving it.

        * When i declare new entitry i gave it id but is resticted to the mod so i dont know what forge does to it and if it goes into Entity list or not. But if it does then there have to be the way to get it.

        * second one is to change spawnCreature method so it will spawn my entity , but i dont get how to change it..cuz i dont understand the class Entity that it needs.

here is part of item code:

public boolean onItemUse(ItemStack par1ItemStack, EntityPlayer par2EntityPlayer, World par3World, int par4, int par5, int par6, int par7, float par8, float par9, float par10)
{

	if (par3World.isRemote)
        {
            return true;
        }
        else
        {
            int var11 = par3World.getBlockId(par4, par5, par6);
            par4 += Facing.offsetsXForSide[par7];
            par5 += Facing.offsetsYForSide[par7];
            par6 += Facing.offsetsZForSide[par7];
            double var12 = 0.0D;

            if (par7 == 1 && var11 == Block.fence.blockID || var11 == Block.netherFence.blockID)
            {
                var12 = 0.5D;
            }

            if (spawnCreature(par3World, 50, (double)par4 + 0.5D, (double)par5 + var12, (double)par6 + 0.5D) != null && !par2EntityPlayer.capabilities.isCreativeMode)
            {
                --par1ItemStack.stackSize;
            }

            return true;
        }
}

public static Entity spawnCreature(World var0, int var1, double var2, double var4, double var6)
    {
        
            Entity var8 = null;
            var8 = EntityList.createEntityByID(var1, var0);
            var8.setLocationAndAngles(var2, var4, var6, var0.rand.nextFloat() * 360.0F, 0.0F);
            ((EntityLiving)var8).func_82163_bD();
            var0.spawnEntityInWorld(var8);
            ((EntityLiving)var8).playLivingSound();

            return var8;
    }
}