In the process of taking part in the TopCoder Competition, using the plugin of editor can advance the speed that we solve the problem since time is so important in the competition.
   For simple, i only present the steps to use it.
   #1: download the plugin of CodeProcessor ,FileEdit,TZTester in the link http://www.topcoder.com/tc?module=Static&d1=applet&d2=plugins to the directory, at will as you want .
   #2: to use the plugin, you need to allow the contestapplet to creat and set a security manager. Find the policy file ( just as : D:\Program Files\Java\jre1.6.0\lib\security\java.policy ), open it by some text editor and add the following sentence:
   grant codeBase "http://www.topcoder.com/-" {

     permission java.lang.RuntimePermission "setSecurityManager";

     permission java.lang.RuntimePermission "createSecurityManager";

   };
   After making that,you should either reboot your pc or at least reboot the brower to make the taking affict.
  #3:Start the Competition Arena and press the Eidtor button in the Options. The a box will pop. Press the Add button. For the name ,type as "CodePrecessor" and anyone you like to . For the entry point ,type "codeprocessor.EntryPoint"(here case is important,so make sure about it) . For the classpath, press the browse button and navigate to where you put the CodeProcessor.jar and add it to the column. Repeat this to add the FileEdit.jar ,TZTester.jar. And add a ";" between the two classpaths. Remember this. After that ,press OK, and a CodeProcessor plugin will apear if you didn't have made any mistake.
  #4:Select the CodeProcessor plugin ,and press the Configure button. For the Editor EntryPoint ,type fileedit.EntryPoint. The press the Configure button. In the General , you can set the directory to place the source code and the problem discription . You can choose the formate to get the problem in the local hardware. Then see the CodeTemplate. Here you can modify the template as you want for different languages. For example, for the c++,i use the following template:
    $BEGINCUT$
$PROBLEMDESC$
$ENDCUT$
#line $NEXTLINENUMBER$ "$FILENAME$"
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <cstring>
using namespace std;
class $CLASSNAME$
        {
        public:
        $RC$ $METHODNAME$($METHODPARMS$)
            {
            //$CARETPOSITION$
            }
        $TESTCODE$
        };

    // BEGIN CUT HERE
    int main()
        {
        $CLASSNAME$ ___test;
        ___test.run_test(-1);
        system("pause");
        }
    // END CUT HERE 
    When we finish the above settings ,let's come back to the CodePrecessor  Configure. For the Processor Class ,type tangentz.TZTester. Whether it will work can be checked by press the Verify button. Then press the Save button to save what you have setted.
    #5: Now you can enter anyone of the room and open the problem. When the problem is opened successful, the problem file will be saved in the local hardware ,also , one cpp file with the template you have created will be created too. All these are in the directory you have setted in the setp #4.  As default, they are put in the desktop.  Then you can open the cpp file and code in the local IDE and compile and testing in the local machine.  When you want to subbmit the solution , go to the problem page in topcoder, and press the Compile button . The you can press the Subbmit button if you didn't get some compile error in the compile phaze.

   If you are interested for the details of the using about them , you can come to the topcoder web and the document about every plugin will be found. Or visiting the forum when you meet some problems .