GroundBound
I can't help with the Belgian IMC Rating (is there really one there; the airspace seems almost entirely Class B all over the country) but I would advise that you get every instrument flight signed in your logbook by the instructor. And make sure it says next to each one what the flight was.
I was told this in connection with the FAA IR; one's UK IMCR training hours can be used towards the FAA IR hours.
Otherwise, anybody could just invent the logbook entries.
On books, I personally don't like the Trevor Thom book 5. Unlike the rest of this books, it is very dis-jointed and was probably written by several different people. My copy also contained various diagrams (to do with NDB tracking I think) which were simply wrong; no instructor I showed them to could work them out.
The most important thing by far with IMCR training is to get an instructor who actually flies IFR to real places. His perspective will be very different to somebody who just teaches it in the abstract. That's assuming you want to fly to real places
- you might not...