Not my Model, ok the background is nice and the round corners by the Pics looks also nice, but the space between the Pics is not good. Try to make it parallel. You have in PS the Funktion called ''Magnetische Hilfslinien'' go to Ansicht -> Einblenden -> Magnetische Hilflinien and the funktion called ''Ausrichten'' go to Ansich -> Ausrichten. Then make it PS automatic Parallel.

When you have problem with PS load video2brain Photoshop tutorial for rookies and Pro's. I think it's the best Tutorial for PS rookies. Or if you use a messenger you can add me i use Skype, ICQ and Steam