experiment re  Bug 320191 -  [pde] Exporting an OT plug-in requires to have org.eclipse.objectteams.runtime in the ws
try to avoid repackaging/nesting of otre.jar, set OTRE classpath container directly to org.eclipse.objectteams.runtime.
diff --git a/plugins/org.eclipse.objectteams.runtime/.classpath b/plugins/org.eclipse.objectteams.runtime/.classpath
index 836ff97..304e861 100644
--- a/plugins/org.eclipse.objectteams.runtime/.classpath
+++ b/plugins/org.eclipse.objectteams.runtime/.classpath
@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry exported="true" kind="lib" path="lib/otre.jar"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5"/>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>