Extract Exlipse (eclipse-SDK-3.0.1-win32.zip) and copy to C:\eclipse. It can be uninstalled by removing the directory (there is no entry in the registry).
Likewise extract Language Pack (NLpack-eclipse-SDK-3.0.x-win32.zip) and copy over C:\eclipse directory.
Eclipse directory will be
C:\eclipse\
C:\eclipse\configuration\
Plugin configuration directory
C:\eclipse\features\
Features directory
C:\eclipse\plugins\
Plugin directory
C:\eclipse\eclipse.exe
Exlipse executable file
Start and Close Eclipse
You just need to execute (double click) eclipse.exe file in the exlipse directory. When you start first time, you can select a workspace. The workspace is to store your projects in the directory. You may select C:\eclipse\workspace or elsewhere.
Click a worktench icon to start using eclipse.
To clise Eclipse, click [x] button, or select [File] -> [Exit] from menu.