diff --git a/libisoburn/trunk/README b/libisoburn/trunk/README
index 35c55c9b..1bfdda9f 100644
--- a/libisoburn/trunk/README
+++ b/libisoburn/trunk/README
@@ -158,9 +158,15 @@ and parsing of reply messages.
 As a proof of concept, there is the Tcl/Tk script xorriso-tcltk which can
 be launched by this shell command:
 
-    xorriso -launch_frontend $(which xorriso-tcltk) --stdio --
+    xorriso-tcltk
 
-See file frontend/README-tcltk for a description of its GUI.
+Or in the xorriso build directory, without installation of xorriso:
+
+    xorriso/xorriso -launch_frontend frontend/xorriso-tcltk --stdio --
+
+In the running GUI, click with the rightmost mouse button on any GUI element
+to get its particular help text.
+See file frontend/README-tcltk for a short introduction.
 See its Tcl code for getting an idea how this gets achieved.
 
 Further there is the C program frontend/frontend_pipes_xorriso.c which
diff --git a/libisoburn/trunk/xorriso/README_gnu_xorriso b/libisoburn/trunk/xorriso/README_gnu_xorriso
index c897e69e..82fba5ed 100644
--- a/libisoburn/trunk/xorriso/README_gnu_xorriso
+++ b/libisoburn/trunk/xorriso/README_gnu_xorriso
@@ -149,15 +149,17 @@ input and output of xorriso. Several commands of xorriso help with receiving
 and parsing of reply messages.
 
 As a proof of concept, there is the Tcl/Tk script xorriso-tcltk which can
-be launched by this shell command in the directory where xorriso was built:
+be launched by this shell command:
+
+    xorriso-tcltk
+
+Or in the xorriso build directory, without installation of xorriso:
 
     xorriso/xorriso -launch_frontend frontend/xorriso-tcltk --stdio --
 
-resp. after installation:
-
-    xorriso -launch_frontend $(which xorriso-tcltk) --stdio --
-
-See file frontend/README-tcltk for a description of its GUI. 
+In the running GUI, click with the rightmost mouse button on any GUI element
+to get its particular help text.
+See file frontend/README-tcltk for a short introduction.
 See its Tcl code for getting an idea how this gets achieved.
 
 Further there is the C program frontend/frontend_pipes_xorriso.c which