You can set the screen orientation individually for Homescreen, Menu and each application from “Options -> Setup Orientation”. Options are portrait, landscape or automatic screen orientation (landscape is only in Symbian”3 version). After you have set up, leave application running in background by pressing “Back” button, It will work automatically after that.
My Screen Orientation v2.00(3) Signed Nokia S60v5/Symbian^3/Anna/Belle
Nokia Symbian^3 (S^3)
Nokia N8, C6-01, C7-00, E7-00, E6, X7, 500, 603, 700, 701, 808
Symbian S60v5 (S^1)
Nokia 5228, 5230, 5233, 5235, 5250, 5530 XpressMusic, 5800 XpressMusic, C5-03, C6-00, N97, N97 mini, X6, Samsung i8910 Omnia HD, Sony Ericsson Satio, Sony Ericsson Vivaz