The sim will more than likely be fixed configuration flaps wise with gear selection only available and the thrust should be vastly derated to make the thing a little easier to fly.
Just make sure you cover the basics such as before and after takeoff checklists such as you would in any aeroplane that you fly. If you have a routine for remembering to carry out procedures and checklists then use it. You won't be expected to know aircraft specific chex but if you think a certain checklist or procedure is required then call for it and the check pilot should carry it out.
Expect a normal takeoff and cleanup, some manouevering, an approach and more than likely a go around. Once established in the go around you might get a comment along the lines of "That's fine now just land straight ahead" if you do don't forget to say "Gear down"
It's years since I did mine and it was in a B747 Classic sim but the checker knew my background so I got a V1 cut on the first takeoff. Bit of a surprise.
Good luck.
BH.