-do a graphical setup, choosing all defaults (gnome, auto partition, your
usual timezone etc.)
-when you get the X setup screen choose use graphical login and customise
-choose the modes which you want to use, don test it
-you're now in the ready to install screen
-choose back because you forgot to test the custom setup
-now the mode selection screen only shows the modes you selected before.
*** This bug has been marked as a duplicate of 6128 ***