I based this theme of an older one I found when it was 1.0, I updated it for 1.2 and found it also works for 1.3. To install:
- Download the theme
- Unzip, put the whole Mix folder inside __SCE__PDA/image
- Run PSP-PDA, press start and select Theme
- Choose Mix
When I did this (on 3.40 OE-A) PSP-PDA 1.3 crashed, but I restarted PSP-PDA to the new theme, working without any error. I hope you enjoy.