pycroft, I put
this lot together a few years ago.
It is rather out of date in some of its detail now. Probably the biggest changes being that now you should use AFPex for submitting flight plans, rather than fax (the numbers I provide are definitely unusable now), and the GAR for Customs and Immigration etc can be emailed rather than faxed.
So far as telling you what you need to do it's still correct - it's the detail of HOW that's time expired.
A and C's notes are likely to be more helpful, but if there are any questions you want more background on then my stuff could be worth a squint.
I'll probably get round to updating it, but probably not soon!