I know that in the US flight training hours for CPL etc. can be split by two pilots so both log PIC hours at the same time, this is simply not allowed anywhere else in the world
True, but it really isn't too absurd, given that we are talking about
logging PIC, and not
acting as PIC.
1) how the hell are you going to calculate actual IMC hours, if you're flying in and out of cloud are you going to sit there with a stop watch?
Just use your best guess. It's always been my opinion that at an interview, they care more about how well you fly in IMC than how much time you have in IMC.