diff --git a/libisofs/eltorito.c b/libisofs/eltorito.c
index b6f0e84..11e9c14 100644
--- a/libisofs/eltorito.c
+++ b/libisofs/eltorito.c
@@ -312,7 +312,8 @@ int iso_tree_add_boot_node(IsoDir *parent, const char *name, IsoBoot **boot)
 static
 int create_image(IsoImage *image, const char *image_path,
                  enum eltorito_boot_media_type type,
-                 struct el_torito_boot_image **bootimg)
+                 struct el_torito_boot_image **bootimg,
+                 IsoFile **bootnode)
 {
     int ret;
     struct el_torito_boot_image *boot;
@@ -323,6 +324,7 @@ int create_image(IsoImage *image, const char *image_path,
     IsoNode *imgfile;
     IsoStream *stream;
 
+    *bootnode = NULL;
     ret = iso_tree_path_to_node(image, image_path, &imgfile);
     if (ret < 0) {
         return ret;
@@ -337,6 +339,7 @@ int create_image(IsoImage *image, const char *image_path,
     if (imgfile->type != LIBISO_FILE) {
         return ISO_BOOT_IMAGE_NOT_VALID;
     }
+    *bootnode = (IsoFile *) imgfile;
 
     stream = ((IsoFile*)imgfile)->stream;
 
@@ -461,6 +464,7 @@ int iso_image_set_boot_image(IsoImage *image, const char *image_path,
     struct el_torito_boot_catalog *catalog;
     ElToritoBootImage *boot_image= NULL;
     IsoBoot *cat_node= NULL;
+    IsoFile *boot_node;
 
     if (image == NULL || image_path == NULL || catalog_path == NULL) {
         return ISO_NULL_POINTER;
@@ -513,7 +517,7 @@ int iso_image_set_boot_image(IsoImage *image, const char *image_path,
     }
 
     /* create the boot image */
-    ret = create_image(image, image_path, type, &boot_image);
+    ret = create_image(image, image_path, type, &boot_image, &boot_node);
     if (ret < 0) {
         goto boot_image_cleanup;
     }
@@ -530,6 +534,8 @@ int iso_image_set_boot_image(IsoImage *image, const char *image_path,
         catalog->bootimages[i] = NULL;
     catalog->node = cat_node;
     catalog->sort_weight = 1000;                            /* slightly high */
+    if (!boot_node->explicit_weight)
+        boot_node->sort_weight = 2;
     iso_node_ref((IsoNode*)cat_node);
     image->bootcat = catalog;
 
@@ -700,14 +706,17 @@ int iso_image_add_boot_image(IsoImage *image, const char *image_path,
     int ret;
     struct el_torito_boot_catalog *catalog = image->bootcat;
     ElToritoBootImage *boot_img;
+    IsoFile *boot_node;
 
     if(catalog == NULL)
       return ISO_BOOT_NO_CATALOG;
     if (catalog->num_bootimages >= Libisofs_max_boot_imageS)
         return ISO_BOOT_IMAGE_OVERFLOW;
-    ret = create_image(image, image_path, type, &boot_img);
+    ret = create_image(image, image_path, type, &boot_img, &boot_node);
     if (ret < 0) 
         return ret;
+    if (!boot_node->explicit_weight)
+        boot_node->sort_weight = 2;
     catalog->bootimages[catalog->num_bootimages] = boot_img;
     catalog->num_bootimages++;
     if (boot != NULL)
diff --git a/libisofs/node.c b/libisofs/node.c
index 7f7041f..e1545cb 100644
--- a/libisofs/node.c
+++ b/libisofs/node.c
@@ -1048,6 +1048,7 @@ void iso_node_set_sort_weight(IsoNode *node, int w)
         }
     } else if (node->type == LIBISO_FILE) {
         ((IsoFile*)node)->sort_weight = w;
+        ((IsoFile*)node)->explicit_weight = 1;
     }
 }
 
@@ -1430,6 +1431,8 @@ int iso_node_new_file(char *name, IsoStream *stream, IsoFile **file)
     new->node.type = LIBISO_FILE;
     new->node.name = name;
     new->node.mode = S_IFREG;
+    new->from_old_session = 0;
+    new->explicit_weight = 0;
     new->sort_weight = 0;
     new->stream = stream;
 
diff --git a/libisofs/node.h b/libisofs/node.h
index 6761143..2cdac22 100644
--- a/libisofs/node.h
+++ b/libisofs/node.h
@@ -149,8 +149,15 @@ struct Iso_File
 {
     IsoNode node;
 
+    /* 1 = The node was loaded from an existing ISO image and still refers
+           to its data content there.
+    */
     unsigned int from_old_session : 1;
 
+    /* 1 = The node got attributed a weight by iso_node_set_sort_weight().
+    */
+    unsigned int explicit_weight : 1;
+
     /**
      * It sorts the order in which the file data is written to the CD image.
      * Higher weighting files are written at the beginning of image