Sorry, I can't help with either request. Page requests depends on how resource-intensive your page requests are. I don't remember how much CPU you were using, but it was in the red.
whynot: Please wait until "Server Load" under "Service Status" in your cPanel is below 4, and then try adding the domain again once. You will have to wait 24 hours after adding your domain for it to become active.
Again, the page is very clear as to how to enable customErrors. It is not hard to do, and you still haven't done it. If you are confused, use Google.
My job is help you when you can't help yourself. In this case, you can very clearly help yourself.