Probably a stupid question, but I can't seem to find a way to do an accumulator while in Trainer/Owner mode, can you actually do them? Since whenever I go to the race course, I can only see 1 race at a time. Also when the races are on, I have this huge rectangle on my screen while the race is taking place, I've noticed that on many of your screenshots, you don't have it. How you can remove this or put something in it etc?

You can put an accumulator on before you go to the races only. There is a minature betting slip on the "home screen" next to the names of the courses that are due to run that day. Click on that, and you will be able to place your accy! (alternatively, read the instruction book!!).

I have the large rectangle too, but only on wide-screen resolution. Lowering the resolution will get rid of it. Hope this helps!