Theres a very simple way to solve this .... Have a look in the tutorials section on the site ... theres a very good one, I cant remember who by, for the default 737 ... it takes you right through an IFR flight from gate ... to gate.
It includes an ILS approach.
Theres probably one in tutorials section for light aircraft too.
Tis an amazing site this if you take the time to look around ::)

cheers
eno
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