diff --git a/SimPEG/forward/DCProblem/DCProblem.py b/SimPEG/forward/DCProblem/DCProblem.py
index 1df8897b..45b8a2c1 100644
--- a/SimPEG/forward/DCProblem/DCProblem.py
+++ b/SimPEG/forward/DCProblem/DCProblem.py
@@ -105,6 +105,10 @@ class DCProblem(Problem):
 
 
 if __name__ == '__main__':
+
+    from SimPEG.regularization import Regularization
+    from SimPEG import inverse
+
     # Create the mesh
     h1 = np.ones(100)
     h2 = np.ones(100)
@@ -143,7 +147,7 @@ if __name__ == '__main__':
     dobs, Wd = synthetic.createData(mSynth, std=0.05)
 
     u = synthetic.field(mSynth)
-    mesh.plotImage(u[:,10], showIt=True)
+    mesh.plotImage(u[:,10], showIt=False)
 
     # Now set up the problem to do some minimization
     problem = DCProblem(mesh)
@@ -153,8 +157,15 @@ if __name__ == '__main__':
     problem.dobs = dobs
     m0 = mesh.gridCC[:,0]*0+sig1
 
-    print problem.misfit(m0)
-    print problem.misfit(mSynth)
+    # print problem.misfit(m0)
+    # print problem.misfit(mSynth)
+
+    opt = inverse.InexactGaussNewton()
+    reg = Regularization(mesh)
+
+    inv = inverse.Inversion(problem, reg, opt)
+
+    inv.run(m0)
 
     # Check Derivative
     derChk = lambda m: [problem.misfit(m), problem.misfitDeriv(m)]
@@ -166,3 +177,5 @@ if __name__ == '__main__':
     w = np.random.rand(dobs.shape[0])
     print w.dot(problem.J(mSynth, v, u=u))
     print v.dot(problem.Jt(mSynth, w, u=u))
+
+
diff --git a/SimPEG/forward/Problem.py b/SimPEG/forward/Problem.py
index 04f9771a..0333b8b4 100644
--- a/SimPEG/forward/Problem.py
+++ b/SimPEG/forward/Problem.py
@@ -62,6 +62,15 @@ class Problem(object):
     def P(self, value):
         self._P = value
 
+    @property
+    def std(self):
+        """
+            Estimated Standard Deviations.
+        """
+        return self._std
+    @std.setter
+    def std(self, value):
+        self._std = value
 
     @property
     def dobs(self):
diff --git a/SimPEG/inverse/Inversion.py b/SimPEG/inverse/Inversion.py
index 99173af0..8d92e15e 100644
--- a/SimPEG/inverse/Inversion.py
+++ b/SimPEG/inverse/Inversion.py
@@ -1,4 +1,5 @@
 import numpy as np
+from SimPEG.utils import sdiag
 
 class Inversion(object):
     """docstring for Inversion"""
@@ -11,20 +12,18 @@ class Inversion(object):
         self.opt = opt
 
     @property
-    def W(self):
+    def Wd(self):
         """
             Standard deviation weighting matrix.
         """
-        return self._W
-    @W.setter
-    def W(self, value):
-        self._W = value
+        return sdiag(1/self.prob.std)
 
     def run(self, m0):
+        m = m0
         self._iter = 0
         while True:
             self._beta = self.getBeta()
-            self.opt.minimize(self.evalFunction,m)
+            m = self.opt.minimize(self.evalFunction,m)
             if self.stoppingCriteria(): break
             self._iter += 1
 
diff --git a/SimPEG/inverse/Optimize.py b/SimPEG/inverse/Optimize.py
index c3ad8dd2..43776d33 100644
--- a/SimPEG/inverse/Optimize.py
+++ b/SimPEG/inverse/Optimize.py
@@ -111,13 +111,16 @@ class Minimize(object):
         self._STOP[4] = self._iter >= self.maxIter
         return all(self._STOP[0:3]) | any(self._STOP[3:])
 
+    def projection(self, p):
+        return p
+
     def linesearch(self, p):
         # Armijo linesearch
         descent = np.inner(self.g, p)
         t = 1
         iterLS = 0
         while iterLS < self.maxIterLS:
-            xt = self.xc + t*p
+            xt = self.projection(self.xc + t*p)
             ft = self.evalFunction(xt, return_g=False, return_H=False)
             if ft < self.f + t*self.LSreduction*descent:
                 break
diff --git a/SimPEG/inverse/__init__.py b/SimPEG/inverse/__init__.py
index b2a5e506..c4ca335b 100644
--- a/SimPEG/inverse/__init__.py
+++ b/SimPEG/inverse/__init__.py
@@ -1 +1,2 @@
 from Optimize import *
+from Inversion import *
diff --git a/SimPEG/regularization/__init__.py b/SimPEG/regularization/__init__.py
new file mode 100644
index 00000000..0230f8c3
--- /dev/null
+++ b/SimPEG/regularization/__init__.py
@@ -0,0 +1 @@
+from Regularization import Regularization