diff --git a/todo.md b/todo.md
index 35eb201..c888d89 100644
--- a/todo.md
+++ b/todo.md
@@ -1,5 +1,53 @@
 # To Do...
 
+# Modular Approach
+
+## Folder Structure
+
+* main.sh
+  * ./services
+    * tftpd-hpa
+      * plugin.sh
+      * config.sh
+      * ./templates
+      * ./build
+    * nfs
+    * samba
+    * iscsi / tgt
+    * lighthttpd
+  * ./menues
+    * default
+      * plugin.sh
+      * config.sh
+      * ./templates
+      * ./build
+    * branded-menue
+  * ./plugins
+    * Knoppix
+      * plugin.sh
+      * config.sh
+      * ./templates
+      * ./build
+      * ./resources
+      * ./downloads
+      * ./temp
+    * Rescuezilla
+    * FreeDOS
+    * Clonezilla
+
+## Structure
+
+### main.sh
+* drives all actions:
+  * init - bootstrap the bare minimum: debian packages, config files, etc.
+  * build - build all enabled plugins: trigger downloads, file processing
+  * build-all - build even disabled plugins
+  * start / stop / restart - handle services
+
+### ./menues
+  * 
+
+
 * Modular pxelinux menu:
  * split menu in parts: Knoppix, Rescuezilla, Acronis, etc.
  * use settings.sh as configuration file, e.g. MENU_KNOPPIX=YES or MENU_NON-FREE=NO