Hi, I'm curious, going to try a few times on PGR4 arcade, but i'm curious, does it need to be a new game, or can we use any car, like PGR2's NG+ category?

I actually don't remember what I did. But I'm going to say yes. You can use any car for arcade but Gotham Career is NG

Awesome, thank you. Now, I'm very new to speedrunning, so I don't have a timer on screen. I done Catch Me If You Can there, going to find a way of submitting it, does the timer matter, or how does that work?

Having an onscreen timer is not required. I would recommending checking start and end times to find your final time and I would say to just upload your run to YouTube and then submit via the Submit Run button

Thanks again, video is uploading now, i'll watch your run again to determine exactly the start and end point.