It isn't so easy
There must be edited a script in Launcher to automatically resize all the elements like icons , status bar , etc.
In my port for Galaxy 5 I almost fixed the problems with theming.There is a little dead zone in the topleft corner , icons are too big and lockscreens still doesn't work but is important that we can have status bar , dialer etc.
Thank you very much bravovn for you port.
You are in the thanks section of my ROM and every G5 owner must thank you too for port.
Sony Ericsson Xperia Arc S White
Unlocked Bootloader | Rooted | Supercharged
ROM: Android 2.3.4 Stock
Kernel: Advanced Stock Kernel
OC: 245Mhz - 1,517Ghz | SmartassV2 | Deadline