Keef - please read the text of the rule, which I've pasted a couple of posts up. There is nothing in there which mentions an "approach", nothing which says that you can't make up your own unofficial procedure. The only rule which there is any debate about is rule 29, but that rule explicitly states that it doesn't apply when "it is necessary for the aircraft to do so in order to... land".
Therefore, I can't see anything illegal with following the old Goodwood "procedure", even though it's not recognised any more. As far as I can tell, it is possible to do this while still complying with all the IFR rules.
Interesting point about minimums, though - now that we are not following a "procedure", what minimums can we use? I don't know the answer to that - I suspect it would be to find an appropriate MSA, add a safety margin to it, check that you're within the system minima for the type of approach aids which your "track and height profiles on the scrap of paper" make use of, and if you're IMC-rated check that this is above the recommended minima for an IMC-rated pilot? In other words, do basically what an airport authority would be required to do if they were creating an official procedure.
FFF
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