Best way is to log your mil flying exactly the way the civvies would in another logbook and get it approved as you fly.
As for the conversion factor, the letter that I used was issued by HQ PTC under PTC/285071/P&P dated 1 Nov 96.
It details the conversion factors allowed and the rules under which they are applied as well as providing a handy dandy table to put the hours in. I used it, added my civvy guff and then had my new hours validated by the RAF (i.e My Boss) who signed that the new total was a true reflection of my experience blah..... IAW ref above.
Hope that helps, off to the beach.
Ghost
