Теперь это (почти) универсальная хрень. ServerMods таки мешают, хотя для клиента их просто удалить, для сервера - проблема серверовладельца, там авторизация из полезного только и та жопой сделана.

src/cr0s/WarpDrive/BlockProtocol.java

@@ -89,7 +89,6 @@ public class BlockProtocol extends BlockContainer {
      * Called upon block activation (right click on the block.)
      */
     @Override
-    @SideOnly(Side.SERVER)
     public boolean onBlockActivated(World par1World, int par2, int par3, int par4, EntityPlayer par5EntityPlayer, int par6, float par7, float par8, float par9)
     {
         if (FMLCommonHandler.instance().getEffectiveSide().isClient())

src/cr0s/WarpDrive/BlockRadar.java

@@ -84,7 +84,6 @@ public class BlockRadar extends BlockContainer {
     }    
     
     @Override
-    @SideOnly(Side.SERVER)
     public boolean onBlockActivated(World par1World, int par2, int par3, int par4, EntityPlayer par5EntityPlayer, int par6, float par7, float par8, float par9)
     {
         if (FMLCommonHandler.instance().getEffectiveSide().isClient())

src/cr0s/WarpDrive/BlockReactor.java

@@ -80,7 +80,6 @@ public class BlockReactor extends BlockContainer {
     /**
      * Called upon block activation (right click on the block.)
      */
-    @SideOnly(Side.SERVER)
     @Override
     public boolean onBlockActivated(World par1World, int par2, int par3, int par4, EntityPlayer par5EntityPlayer, int par6, float par7, float par8, float par9)
     {

src/cr0s/WarpDrive/EntityJump.java

@@ -1,5 +1,6 @@
 package cr0s.WarpDrive;
 
+import cpw.mods.fml.common.FMLCommonHandler;
 import cpw.mods.fml.relauncher.Side;
 import cpw.mods.fml.relauncher.SideOnly;
 import dan200.computer.api.IPeripheral;
@@ -118,9 +119,10 @@ public class EntityJump extends Entity {
         }
     }
 
-    @SideOnly(Side.SERVER)
     @Override
     public void onUpdate() {
+        if (FMLCommonHandler.instance().getEffectiveSide().isClient())
+            return;
         if (!on || worldObj.getBlockId(xCoord, yCoord, zCoord) != WarpDrive.WARP_CORE_BLOCKID) {
             unlockWorlds();
             worldObj.removeEntity(this);

src/cr0s/WarpDrive/EntitySphereGen.java

@@ -1,5 +1,6 @@
 package cr0s.WarpDrive;
 
+import cpw.mods.fml.common.FMLCommonHandler;
 import cpw.mods.fml.relauncher.Side;
 import cpw.mods.fml.relauncher.SideOnly;
 import net.minecraft.block.Block;
@@ -76,9 +77,10 @@ public final class EntitySphereGen extends Entity {
         worldObj.removeEntity(this);
     }
 
-    @SideOnly(Side.SERVER)
     @Override
     public void onUpdate() {
+        if (FMLCommonHandler.instance().getEffectiveSide().isClient())
+            return;
         if (!on)
         {
             System.out.println("[SGEN] onUpdate(): entity disabled.");

src/cr0s/WarpDrive/SpaceGenerator.java

@@ -34,7 +34,6 @@ public class SpaceGenerator extends ChunkProviderGenerate implements IChunkProvi
     }
 
     @Override
-    //@SideOnly(Side.SERVER)
     public Chunk provideChunk(int par1, int par2) {
         this.rand.setSeed((long) par1 * 341873128712L + (long) par2 * 132897987541L);
         byte[] var3 = new byte[32768];

src/cr0s/WarpDrive/TileEntityProtocol.java

@@ -4,6 +4,7 @@
  */
 package cr0s.WarpDrive;
 
+import cpw.mods.fml.common.FMLCommonHandler;
 import cpw.mods.fml.relauncher.Side;
 import cpw.mods.fml.relauncher.SideOnly;
 import dan200.computer.api.IComputerAccess;
@@ -57,9 +58,10 @@ public class TileEntityProtocol extends TileEntity implements IPeripheral {
 
     private TileEntity core;    
     
-    @SideOnly(Side.SERVER)
     @Override
     public void updateEntity() {
+        if (FMLCommonHandler.instance().getEffectiveSide().isClient())
+            return;
         if (++ticks >= BLOCK_UPDATE_INTERVAL){
             findCoreBlock();
             

src/cr0s/WarpDrive/TileEntityRadar.java

@@ -1,5 +1,6 @@
 package cr0s.WarpDrive;
 
+import cpw.mods.fml.common.FMLCommonHandler;
 import cpw.mods.fml.relauncher.Side;
 import cpw.mods.fml.relauncher.SideOnly;
 import dan200.computer.api.IComputerAccess;
@@ -37,9 +38,10 @@ public class TileEntityRadar extends TileEntity implements IPeripheral, IEnergyS
         return ((getCurrentEnergyValue() - needEnergy) > 0);
     }
     
-    @SideOnly(Side.SERVER)
     @Override
     public void updateEntity() {
+        if (FMLCommonHandler.instance().getEffectiveSide().isClient())
+            return;
         try {
             if (worldObj.getBlockMetadata(xCoord, yCoord, zCoord) == 2) {
                 if (cooldownTime++ > (20 * ((scanRadius / 1000) + 1))) {

src/cr0s/WarpDrive/TileEntityReactor.java

@@ -4,6 +4,7 @@
  */
 package cr0s.WarpDrive;
 
+import cpw.mods.fml.common.FMLCommonHandler;
 import cpw.mods.fml.relauncher.Side;
 import cpw.mods.fml.relauncher.SideOnly;
 import ic2.api.Direction;
@@ -93,9 +94,10 @@ public class TileEntityReactor extends TileEntity implements IEnergySink {
     public String coreState = ""; 
     public TileEntityProtocol controller;
     
-    @SideOnly(Side.SERVER)
     @Override
     public void updateEntity() { 
+        if (FMLCommonHandler.instance().getEffectiveSide().isClient())
+            return;
         // Update warp core in cores registry
         if (++registryUpdateTicks > CORES_REGISTRY_UPDATE_INTERVAL_SECONDS * 20) {
             registryUpdateTicks = 0;

src/cr0s/WarpDrive/WarpDrive.java

@@ -117,7 +117,6 @@ public class WarpDrive {
         registry = new WarpCoresRegistry();
     }
 
-    //@SideOnly(Side.SERVER)
     private void registerSpaceDimension() {
         spaceBiome = (new BiomeSpace(23)).setColor(0).setDisableRain().setBiomeName("Space");
         this.spaceProviderID = 14;