diff --git a/autolib.py b/autolib.py
index 20e12fb..e339829 100644
--- a/autolib.py
+++ b/autolib.py
@@ -19,6 +19,7 @@
 # the whole pypy projet is under MIT licence
 # ____________________________________________________________
 "enables us to carry out a calculation and return an option's value"
+from tiramisu.error import DisabledOptionError, SpecialOwnersError
 # ____________________________________________________________
 # automatic Option object
 special_owners = ['auto', 'fill']
@@ -31,7 +32,7 @@ def special_owner_factory(name, owner, value,
     # we have to carry out a calculation
     return calc_factory(name, callback, callback_params, config)
 
-g = globals()
+#g = globals()
 
 def calc_factory(name, callback, callback_params, config):
     # FIXME we have to know the exact status of the config 
@@ -39,6 +40,7 @@ def calc_factory(name, callback, callback_params, config):
     # config.freeze()
     if callback_params is None:
         callback_params = {}
+    tcparams = {}
     for key, value in callback_params.items():
         if type(value) == tuple:
             path, check_disabled = value
@@ -46,20 +48,18 @@ def calc_factory(name, callback, callback_params, config):
                 opt_value = getattr(config, path)
             except DisabledOptionError, e:
                 if chek_disabled:
-                    del(callback_params[key])
                     continue
                 raise DisabledOptionError(e)
-            callback_params[key] = opt_value
+            tcparams[key] = opt_value
+        else:
+            tcparams[key] = value
     try:
         #return getattr(autolib, callback)(name, config)
-        return g[callback](name, config, **callback_params)
+        #return g[callback](name, config, **callback_params)
+        from creole import eosfunc
+        return getattr(eosfunc, callback)(**tcparams) 
     except AttributeError:
+        import traceback
+        traceback.print_exc()
         raise SpecialOwnersError("callback: {0} not found for "
                                            "option: {1}".format(callback, name))
-# ____________________________________________________________
-
-# FIXME: import eosfunc here
-def identical(name, config, *args):
-    return "identical" + name 
-    
-    
diff --git a/config.py b/config.py
index 1c34288..f9610ff 100644
--- a/config.py
+++ b/config.py
@@ -67,7 +67,13 @@ class Config(object):
         for child in self._cfgimpl_descr._children:
             if isinstance(child, Option):
                 self._cfgimpl_values[child._name] = child.getdefault()
-                self._cfgimpl_value_owners[child._name] = 'default'
+                if child.getcallback() is not None:
+                    if child._is_hidden():
+                        self._cfgimpl_value_owners[child._name] = 'auto'
+                    else:
+                        self._cfgimpl_value_owners[child._name] = 'fill'
+                else:
+                    self._cfgimpl_value_owners[child._name] = 'default'
             elif isinstance(child, OptionDescription):
                 self._validate_duplicates(child._children)
                 self._cfgimpl_values[child._name] = Config(child, parent=self)
@@ -195,7 +201,7 @@ class Config(object):
                             value=self._cfgimpl_values[name],
                             callback=opt_or_descr.getcallback(),
                             callback_params=opt_or_descr.getcallback_params(),
-                            config=self)
+                            config=self._cfgimpl_get_toplevel())
         # mandatory options
         if not isinstance(opt_or_descr, OptionDescription):
             homeconfig = self._cfgimpl_get_toplevel()