diff --git a/ReadMe b/ReadMe
index e2269235dd..d0d88cc344 100644
--- a/ReadMe
+++ b/ReadMe
@@ -77,6 +77,11 @@ Bootable CD-ROM Image
 
 * UNSUPPORTED yet *
 
+This _requires_ having the mkisofs tool installed.
+On Debian GNU/Linux for example you can install it with:
+  apt-get install mkisofs
+On BeOS you can get it from http://bebits.com/app/3964 along with cdrecord.
+
 Creating a bootable CD requires burning 2 tracks on a single CD.
 The first track is an El-Torito bootable ISO file-system containing a boot 
 floppy image, and is created with: