--- css.install
+++ (clipboard)
@@ -46,3 +46,17 @@
 function css_uninstall() {
   drupal_uninstall_schema('css');
 }
+
+/**
+ * Saves CSS to the file system.
+ */
+function css_update_6000() {
+  $ret = array();
+
+  $result = db_query("SELECT * FROM {css}");
+  while ($row = db_fetch_object($result)) {
+    css_save_file($row->css, $row->nid);
+  }
+
+  return $ret;
+}