Stock Precision Zen theme works on the 8330 running 5.0.0.230. Theme extracted from 5.0.0.238 for the 8520.
Extract the files from the zip folder and copy/replace the .alx file to the main C:\Program Files\Common Files\Research In Motion\Shared\Loader Files\8330AMEA_v5.0.0.230_P3.5.0.30 folder with the .alx files then copy/replace the .cod file to the C:\Program Files\Common Files\Research In Motion\Shared\Loader Files\8330AMEA_v5.0.0.230_P3.5.0.30\Java folder then run loader.exe found in C:\Program Files\Common Files\Research In Motion\AppLoader and install the Precision Zen theme.
Download zip folder HERE
