The RCP downloads are meant as a base for building Eclipse RCP applications.  
As such, they do not include an application of their own and simply running the 
RCP install will do nothing.

When running on the IBM Java 5.0 VM, Eclipse crashes while the user is typing in an editor. If using this VM you must disable the JIT
 with the -Xnojit vm argument to avoid the crashes (https://bugs.eclipse.org/bugs/show_bug.cgi?id=116730). The command line for launching Eclipse with this vm should be: 
"eclipse -vmargs -Dosgi.locking=none -Xnojit"