wheel Dilema!!!!!

Ok took dellivery of my new Rota RB's

Heres a shot on the car

And heres the wheels jacked up to their approximate final position.

NOw heres the problem....
There 15 X 8 et 30 and will be running 205/50 and lets say they sit a little proud.....

So I've read over on nutz that 15x 8 with Et30 will fit with 205's but I cant for the life of me see how...... anyone running anything similar........

Heres a shot on the car

And heres the wheels jacked up to their approximate final position.

NOw heres the problem....
There 15 X 8 et 30 and will be running 205/50 and lets say they sit a little proud.....

So I've read over on nutz that 15x 8 with Et30 will fit with 205's but I cant for the life of me see how...... anyone running anything similar........