I wouldn't be bothered with trying to learn the routes off. The tester will change the route depending on traffic/road work conditions. I did my test in Raheny recently and was taken on a completely bizarre route. I hardly noticed as I was concentrating so hard.
Anyway, I failed the stupid thing cos the granny in front also doing her test stalled in the yellow box turning right, I anticipated she was going to turn as she had clearence. I got a grade 3 for entering the yellow box, I had only picked up 2 grade 2 faults.. RAGING..
I wouldn't recommend Raheny, asking around it's a very difficult centre to pick up a pass and the tester was a complete p***k.