diff --git a/sigil/common/core/.classpath b/sigil/common/core/.classpath
index b26935e..5fb534c 100644
--- a/sigil/common/core/.classpath
+++ b/sigil/common/core/.classpath
@@ -3,6 +3,6 @@
 	<classpathentry kind="src" path="src"/>
 	<classpathentry exported="true" kind="lib" path="lib/bndlib.jar" sourcepath="/bld-ivy/lib/ant/bnd-0.0.312.jar"/>
 	<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="con" path="org.cauldron.sigil.core.classpathContainer"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>
diff --git a/sigil/common/core/.project b/sigil/common/core/.project
index 3bbec56..f9a6d90 100644
--- a/sigil/common/core/.project
+++ b/sigil/common/core/.project
@@ -11,12 +11,7 @@
 			</arguments>
 		</buildCommand>
 		<buildCommand>
-			<name>org.eclipse.pde.ManifestBuilder</name>
-			<arguments>
-			</arguments>
-		</buildCommand>
-		<buildCommand>
-			<name>org.eclipse.pde.SchemaBuilder</name>
+			<name>org.cauldron.sigil.core.newtonBuilder</name>
 			<arguments>
 			</arguments>
 		</buildCommand>
@@ -24,5 +19,6 @@
 	<natures>
 		<nature>org.eclipse.pde.PluginNature</nature>
 		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.cauldron.sigil.core.newtonnature</nature>
 	</natures>
 </projectDescription>
diff --git a/sigil/common/core/sigil.properties b/sigil/common/core/sigil.properties
new file mode 100644
index 0000000..0b8febe
--- /dev/null
+++ b/sigil/common/core/sigil.properties
@@ -0,0 +1,32 @@
+
+# sigil project file, saved by plugin.
+
+version: 0.0.0
+
+-bundles: \
+	org.cauldron.bld.core, \
+
+-sourcedirs: \
+	src, \
+
+-exports: \
+	org.apache.felix.sigil.config, \
+	org.apache.felix.sigil.core, \
+	org.apache.felix.sigil.model, \
+	org.apache.felix.sigil.model.common, \
+	org.apache.felix.sigil.model.eclipse, \
+	org.apache.felix.sigil.model.osgi, \
+	org.apache.felix.sigil.repository, \
+
+-imports: \
+	org.apache.felix.sigil.config, \
+	org.apache.felix.sigil.core, \
+	org.apache.felix.sigil.model, \
+	org.apache.felix.sigil.model.common, \
+	org.apache.felix.sigil.model.eclipse, \
+	org.apache.felix.sigil.model.osgi, \
+	org.apache.felix.sigil.repository, \
+	org.eclipse.core.runtime;version=3.4.0, \
+	org.osgi.framework;version=1.4.0, \
+
+# end