For the IR test don't try to reach the perfection, it's a long test and you may be tired before the end... The examiner wants just to see that you are SAFE, he is conscious that you are low houred, that you are under pressure.
Show that you have a potential of taking the right judgement.
Inform ATC that you are "single crew operation" so they will take this in account. If possible ask for descent earlier so you will be in level flight with time to configure properly before starting any hold or procedure.
And off course organise the cockpit in order to be abble to get any chart without having to stop scanning the instruments.