hello, i just purchase the game and i was hoping to customize the texture and to be able to fly and noclip mode.. soo i tried this custom client and it says.. Autodetecting java
Testing default folder
Checking C:\Program Files\Java\jre6 folder
Found java in C:\Program Files\Java\jre6 folder
Starting java from "C:\Program Files\Java\jre6\bin\java.exe"
Exception in thread "main" java.lang.NoClassDefFoundError: Main
Caused by: java.lang.ClassNotFoundException: Main
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: Main.  Program will exit.
ERROR: Failed to run minecraft
JAVA6="C:\Program Files\Java\jre6\bin\java.exe"
Press any key to continue . . .

and i tried using the regular exe and it works but when i try to edit the textures it freezes on the loadup screen.. i cant get any texture wat soo ever to work it either freezes or some msg popsup.. My OS is vist32 bit and im using firefox.. If you can help , that will be great.. o and heres a screen shot when i dont use that clientwraper....soo  whatever i do i just fail on trying to get more out of this game which i paid for ...

Files: 

WTF.jpg