diff --git a/demo/iso_grow.c b/demo/iso_grow.c
index 4b0a07e..157966e 100644
--- a/demo/iso_grow.c
+++ b/demo/iso_grow.c
@@ -109,26 +109,28 @@ int main(int argc, char **argv)
     }
     iso_read_opts_free(ropts);
 
+    iso_tree_set_replace_mode(image, ISO_REPLACE_IF_NEWER);
+
     /* add new dir */
     result = iso_tree_add_dir_rec(image, iso_image_get_root(image), argv[2]);
     if (result < 0) {
         printf ("Error adding directory %d\n", result);
         return 1;
     }
-    
+
     /* generate a multisession image with new contents */
     result = iso_write_opts_new(&opts, 1);
     if (result < 0) {
         printf("Cant create write opts, error %d\n", result);
         return 1;
     }
-    
+
     /* round up to 32kb aligment = 16 block */
     ms_block = ((features->size + 15) / 16 ) * 16;
     iso_write_opts_set_ms_block(opts, ms_block);
     iso_write_opts_set_appendable(opts, 1);
     iso_write_opts_set_overwrite_buf(opts, buf);
-    
+
     free(features);
 
     result = iso_image_create_burn_source(image, opts, &burn_src);
diff --git a/src/libisofs.h b/src/libisofs.h
index aea05c4..404e45d 100644
--- a/src/libisofs.h
+++ b/src/libisofs.h
@@ -85,10 +85,22 @@ enum iso_replace_mode {
     /**
      * Always replace the old node with the new.
      */
-    ISO_REPLACE_ALWAYS
+    ISO_REPLACE_ALWAYS,
+    /**
+     * Replace with the new node if it is the same file type
+     */
+    ISO_REPLACE_IF_SAME_TYPE,
+    /**
+     * Replace with the new node if it is the same file type and its ctime
+     * is newer than the old one.
+     */
+    ISO_REPLACE_IF_SAME_TYPE_AND_NEWER,
+    /**
+     * Replace with the new node if its ctime is newer than the old one.
+     */
+    ISO_REPLACE_IF_NEWER
     /*
      * TODO #00006 define more values
-     *  -to replace only if both are the same kind of file
      *  -if both are dirs, add contents (and what to do with conflicts?)
      */
 };
diff --git a/src/node.c b/src/node.c
index 0ef070e..04846db 100644
--- a/src/node.c
+++ b/src/node.c
@@ -704,20 +704,42 @@ int iso_dir_insert(IsoDir *dir, IsoNode *node, IsoNode **pos,
 {
     if (*pos != NULL && !strcmp((*pos)->name, node->name)) {
         /* a node with same name already exists */
-        if (replace == ISO_REPLACE_NEVER) {
+        switch(replace) {
+        case ISO_REPLACE_NEVER:
             return ISO_NODE_NAME_NOT_UNIQUE;
-        } else if (replace == ISO_REPLACE_ALWAYS) {
-            node->next = (*pos)->next;
-            (*pos)->parent = NULL;
-            (*pos)->next = NULL;
-            iso_node_unref(*pos);
-            *pos = node;
-            node->parent = dir;
-            return dir->nchildren;
-        } else {
+        case ISO_REPLACE_IF_NEWER:
+            if ((*pos)->mtime >= node->mtime) {
+                /* old file is newer */
+                return ISO_NODE_NAME_NOT_UNIQUE;
+            }
+            break;
+        case ISO_REPLACE_IF_SAME_TYPE_AND_NEWER:
+            if ((*pos)->mtime >= node->mtime) {
+                /* old file is newer */
+                return ISO_NODE_NAME_NOT_UNIQUE;
+            }
+            /* fall down */
+        case ISO_REPLACE_IF_SAME_TYPE:
+            if ((node->mode & S_IFMT) != ((*pos)->mode & S_IFMT)) {
+                /* different file types */
+                return ISO_NODE_NAME_NOT_UNIQUE;
+            }
+            break;
+        case ISO_REPLACE_ALWAYS:
+            break;
+        default:
             /* CAN'T HAPPEN */
             return ISO_ASSERT_FAILURE;
         }
+        
+        /* if we are reach here we have to replace */
+        node->next = (*pos)->next;
+        (*pos)->parent = NULL;
+        (*pos)->next = NULL;
+        iso_node_unref(*pos);
+        *pos = node;
+        node->parent = dir;
+        return dir->nchildren;
     }
 
     node->next = *pos;
diff --git a/src/tree.c b/src/tree.c
index 25565e8..4c9e161 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -555,12 +555,24 @@ int iso_add_dir_src_rec(IsoImage *image, IsoDir *parent, IsoFileSource *dir)
             ret = iso_msg_submit(image->id, ISO_FILE_CANT_ADD, ret,
                          "Error when adding file %s", path);
             goto dir_rec_continue;
-        } else {
-            iso_msg_debug(image->id, "Adding file %s", path);
         }
 
         /* ok, node has correctly created, we need to add it */
-        iso_dir_insert(parent, new, pos, replace);
+        ret = iso_dir_insert(parent, new, pos, replace);
+        if (ret < 0) {
+            iso_node_unref(new);
+            if (ret != ISO_NODE_NAME_NOT_UNIQUE) {
+                /* error */
+                goto dir_rec_continue;
+            } else {
+                /* file ignored because a file with same node already exists */
+                iso_msg_debug(image->id, "Skipping file %s. A node with same "
+                              "file already exists", path);
+                ret = 0;
+            }
+        } else {
+            iso_msg_debug(image->id, "Added file %s", path);
+        }
 
         /* finally, if the node is a directory we need to recurse */
         if (new->type == LIBISO_DIR && S_ISDIR(info.st_mode)) {