diff --git a/bin/scripts/__core_func.def b/bin/scripts/__core_func.def
index 2256c79..fe596b4 100644
--- a/bin/scripts/__core_func.def
+++ b/bin/scripts/__core_func.def
@@ -149,7 +149,17 @@ if ?{and,{?{strlen ${@def}}} ?{strlen ${@0}}}
 		logdebug AppendDef: ${@0} didnt exist, created
 	endif
 		
-	lpushback,#DEFSCRIPT::SCRIPT::${@0} ${@def}
+	lpushback,{#DEFSCRIPT::SCRIPT::${@0}} ${@def}
 	unset cmd
 endif
 
+//---------------------------------------------------------
+#script=scripthasline
+//---------------------------------------------------------
+// purpose: check if a script has a certain line of code (exact match)
+// args:
+//  @0: script name
+//  @def: line of text to look for
+
+return ?{lcontains,{#DEFSCRIPT::SCRIPT::${@0}} ${@def}}
+
diff --git a/bin/scripts/example_scriptHook.def b/bin/scripts/example_scriptHook.def
new file mode 100644
index 0000000..8d1dd12
--- /dev/null
+++ b/bin/scripts/example_scriptHook.def
@@ -0,0 +1,56 @@
+//----------------------------------
+#script=hook_example_base
+//----------------------------------
+// just do some random stuff here
+set,var 0
+set,x hello world
+add,var 15
+out base: var=${var}
+
+
+
+//----------------------------------
+#script=hook_example_hooker
+//----------------------------------
+#onload
+set,counter 0
+#/onload
+
+// check if we have already added our code
+if ?{ScriptHasLine,hook_example_base #tag:hook:${@myname}}
+	out Hook Example: code already added, skipping.
+else
+	set,somevar some text
+	
+	// this is a custom "tag" to indicate the modification. its necessary because a 'reloaddef' on base script removes our custom content,
+	// so we can check if our added lines are still there; and a reloaddef on this script would cause the lines to get added twice or more.
+	appenddef,hook_example_base #tag:hook:${@myname}
+	
+	appenddef,hook_example_base out == this is the hooked part ==
+	appenddef,hook_example_base out text copied from hooking script: ${somevar}
+	appenddef,hook_example_base out x in base script: $\{x\}
+	appenddef,hook_example_base out add,a 10
+	appenddef,hook_example_base out var=$\{var\}
+	out Hook Example: ++ code appended.
+endif
+
+// everytine this script gets executed, add the same line of code to a "new" script (its not defined if you call this first time)
+appenddef,hook_example_new out line of text [${counter}]
+add,counter 1
+
+
+
+//----------------------------------
+#script=hook_example_cleanup
+//----------------------------------
+unloaddef hook_example_new
+// other possible way: lclear DEFSCRIPT::SCRIPT::hook_example_new
+
+
+
+//-----------------------------------
+// dummy for running scripts as soon as all scripts in this file are loaded
+#script=dummy
+#onload
+hook_example_hooker
+#/onload
\ No newline at end of file