diff --git a/moin2doku.py b/moin2doku.py
index 4778401..4774270 100755
--- a/moin2doku.py
+++ b/moin2doku.py
@@ -15,6 +15,13 @@ from os.path import isdir, basename
 from doku import DokuWiki
 from moinformat import moin2doku
 
+def scan_underlay_pages(dirpath):
+  pages = []
+  paths = get_path_names(dirpath, basenames = True)
+  for path in paths:
+    pages.append(wikiname(path))
+  return pages
+
 def check_dirs(moin_pages_dir, output_dir):
   if moin_pages_dir and not isdir(moin_pages_dir):
     print >> sys.stderr, "MoinMoin pages directory doesn't exist!"
@@ -24,14 +31,17 @@ def check_dirs(moin_pages_dir, output_dir):
     print >> sys.stderr, "Output directory doesn't exist!"
     sys.exit(1)
 
-def get_path_names(moin_pages_dir):
+def get_path_names(moin_pages_dir, basenames = False):
   items = listdir(moin_pages_dir)
   pathnames = []
 
   for item in items:
-      item = os.path.join(moin_pages_dir, item)
-      if isdir(item):
+      absitem = os.path.join(moin_pages_dir, item)
+      if isdir(absitem):
+        if basenames:
           pathnames.append(item)
+        else:
+          pathnames.append(absitem)
 
   return pathnames
 
@@ -239,6 +249,10 @@ def convertfile(pagedir, overwrite = False):
     print "SKIP %s: skip backups" % pagedir
     return
 
+  if pagename in moin_underlay_pages:
+    print "SKIP %s: page in underlay" % pagename
+    return
+
   content = readfile2(curr_rev)
 #  print "content:[%s]" % content
 #  content = convert_markup(pagename, content)
@@ -261,7 +275,7 @@ def convertfile(pagedir, overwrite = False):
 # "main" starts here
 #
 try:
-  opts, args = getopt.getopt(sys.argv[1:], 'hfm:d:F:', [ "help" ])
+  opts, args = getopt.getopt(sys.argv[1:], 'hfm:u:d:F:', [ "help" ])
 except getopt.GetoptError, e:
   print >> sys.stderr, 'Incorrect parameters! Use --help switch to learn more.: %s' % e
   sys.exit(1)
@@ -269,6 +283,7 @@ except getopt.GetoptError, e:
 overwrite = False
 input_file = None
 moin_pages_dir = None
+moin_underlay_pages = None
 output_dir = None
 for o, a in opts:
   if o == "--help" or o == "-h":
@@ -277,6 +292,8 @@ for o, a in opts:
     overwrite = True
   if o == "-m":
     moin_pages_dir = a
+  if o == "-u":
+    moin_underlay_pages = scan_underlay_pages(a)
   if o == "-d":
     output_dir = a
   if o == "-F":