Creating your own PS3 themes

Step 1: You will need to download the official PS3 Theme Tool by visiting Sony’s Japanese website, then clicking on the button in the bottom right.

Step 2: Extract the file to a folder on your computer

Step 3: Open command prompt and navigate to the folder.

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Step 4: The folder should contain a sample folder, a GrimConv folder, a p3tcompiler.exe and other assorted files. To create your theme you will need to run the p3tcompiler.exe passing in the sample.xml.

Example: If you are in the p3tcompiler_v101 folder, you run: p3tcompiler .sample´┐Ż1sample.xml

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Step 5: This creates a number of .gim files and a sample.p3t files in the sample /01/ directory. Take the sample.p3t file and transfer it to a memory stick in the following location: PS3->THEME

Step 6: Plug the memory stick into your PS3 and select the theme setting, where you will be given an option to install; do so, and you will have your sample theme.

Step 7: To construct your own custom theme, it’s a case of editing all of the .png files in the sample directory, and re-run all of the above.

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Source: Gunlager blog