holdmetight -
Prior to my DA42 sim, I had no multi, CSU, or G1000 time. The learning curve was steep, and they dont expect you to be perfect, they just want to gauge your ability to take instruction. You need to have an understanding of general instrument flight such as NDB/VOR intercepts using the RMI before going in. This will make all the rest a lot easier. I used this great link to practice. Its really basic, but I found it was by far the most useful -
Tim's Air Navigation Simulator
Smell the Coffee -
I certainly stuffed up a few questions along the way. My first interview was by far my worst performance. The questions I struggled with in stage one were not particularly focal in the rest of my interviews. There is such a broad range of questions, and the interviewers dont have a list in front of them, they simply think of them as they go, with most questions leading onto another. I cant guarantee that they dont consider your past interviews, but I didnt feel like they were.
ANT