diff -ur httpd-2.0.58.orig/modules/mappers/mod_dir.c httpd-2.0.58/modules/mappers/mod_dir.c
--- httpd-2.0.58.orig/modules/mappers/mod_dir.c	2007-03-31 19:36:23.000000000 -0400
+++ httpd-2.0.58/modules/mappers/mod_dir.c	2007-03-31 19:39:22.000000000 -0400
@@ -39,6 +39,7 @@
 
 typedef struct dir_config_struct {
     apr_array_header_t *index_names;
+    apr_array_header_t *index_names_incr;
     slash_cfg do_slash;
 } dir_config_rec;
 
@@ -55,6 +56,23 @@
     return NULL;
 }
 
+static const char *add_index_incr(cmd_parms *cmd, void *dummy, const char *arg)
+{
+    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
+
+    if (err != NULL) {
+        return err;
+    }
+
+    dir_config_rec *d = dummy;
+
+    if (!d->index_names_incr) {
+        d->index_names_incr = apr_array_make(cmd->pool, 2, sizeof(char *));
+    }
+    *(const char **)apr_array_push(d->index_names_incr) = arg;
+    return NULL;
+}
+
 static const char *configure_slash(cmd_parms *cmd, void *d_, int arg)
 {
     dir_config_rec *d = d_;
@@ -67,6 +85,8 @@
 {
     AP_INIT_ITERATE("DirectoryIndex", add_index, NULL, DIR_CMD_PERMS,
                     "a list of file names"),
+    AP_INIT_ITERATE("AddDirectoryIndex", add_index_incr, NULL, RSRC_CONF,
+                    "a list of file names"),
     AP_INIT_FLAG("DirectorySlash", configure_slash, NULL, DIR_CMD_PERMS,
                  "On or Off"),
     {NULL}
@@ -77,6 +97,7 @@
     dir_config_rec *new = apr_pcalloc(p, sizeof(dir_config_rec));
 
     new->index_names = NULL;
+	new->index_names_incr = NULL;
     new->do_slash = SLASH_UNSET;
     return (void *) new;
 }
@@ -87,7 +108,26 @@
     dir_config_rec *base = (dir_config_rec *)basev;
     dir_config_rec *add = (dir_config_rec *)addv;
 
-    new->index_names = add->index_names ? add->index_names : base->index_names;
+
+	if (add->index_names) {
+		new->index_names = add->index_names;
+	} else {
+		new->index_names = base->index_names;
+		if (base->index_names_incr) {
+			if (!new->index_names) {
+				new->index_names = apr_array_make(p, 2, sizeof(char *));
+			}
+			apr_array_cat(new->index_names, base->index_names_incr);
+		}
+	}
+
+	if (add->index_names_incr) {
+		if (!new->index_names) {
+			new->index_names = apr_array_make(p, 2, sizeof(char *));
+		}
+		apr_array_cat(new->index_names, add->index_names_incr);
+	}
+	
     new->do_slash =
         (add->do_slash == SLASH_UNSET) ? base->do_slash : add->do_slash;
     return new;
@@ -155,6 +195,14 @@
         return DECLINED;
     }
 
+	if (d->index_names_incr) {
+		if (!d->index_names) {
+			d->index_names = d->index_names_incr;
+		} else {
+			apr_array_cat(d->index_names, d->index_names_incr);
+		}
+	}
+
     if (d->index_names) {
         names_ptr = (char **)d->index_names->elts;
         num_names = d->index_names->nelts;