This guide was created for those with custom firmware 3.03 OE-C or 3.10 OE.

Be very careful, especially because this deals with flash! Messing up can result in a brick!

First, enter recovery mode and Toggle USB (flash0) in Advanced. On your PC, flash0 should appear as a drive (X:). Copy everything in your flash0 to your PC. These will be your backup files in case you mess up.

Each of the following steps are optional. If you do not want to remove a certain item, skip that step.

1. Remove Japanese/Chinese fonts ~ 2,545 KB

In X:/font, create two copies of ltn9.pgf. Delete jpn0.pgf and rename one copy of ltn9.pgf to jpn0.pgf. Delete gb3s1518.bwfon and rename the other copy of ltn9.pgf to gb3s1518.bwfon.

2. Remove Network Update ~ 33.6 KB

In X:/vsh/nodule, delete update_plugin.prx. In X:/vsh/resource, delete update_plugin.rco.

3. Remove Camera Feature ~ 277 KB

In X:/vsh/nodule, delete camera_plugin.prx. In X:/vsh/resource, delete camera_plugin.rco. In X:/kn, delete usbcam.prx.

4. Remove GPS Add-on Feature ~ 15.4 KB

In X:/kn, delete usbgps.prx

5. Remove RSS Features ~ 20.9 KB

In X:/vsh/nodule, delete rss_subscriber.prx. In X:/vsh/resource, delete rss_subscriber.rco.

6. Remove Web Browser ~ 390 KB

in X:/vsh/nodule, delete htmlviewer_plugin.prx, htmlviewer_ui.prx, and htmlviewer_utility.prx. In X:/vsh/resource, delete htmlviewer.fbm, htmlviewer.gim htmlviewer.msg, htmlviewer.res, htmlviewer.snd, and htmlviewer_plugin.rco.

7. Remove Video Player ~ 808 KB

In X:/vsh/nodule, delete msvideo_main_plugin.prx, msvideo_plugin.prx, video_main_plugin.prx, and video_plugin.prx. In X:/vsh/resource, delete msvideo_main_plugin.rco, video_main_plugin.rco, and video_plugin_videotoolbar.rco.

8. Remove Music Player ~ 627 KB

In X:/vsh/nodule, delete music_common.prx, music_main_plugin.prx, and music_plugin.prx. In X:/vsh/resource, delete music_main_plugin.rco.

9. Remove Photo Viewer ~ 232 KB

In X:/vsh/nodule, delete photo_plugin.prx. In X:/vsh/resource, delete photo_plugin.rco.

If you messed up and ended up with a semi-brick, re-enter recovery mode and Toggle USB (flash0) in Advanced. Copy all the flash0 files you backed up earlier to your flash0 (X:). If for some reason you forgot to create a backup of your files, you can always recover back to 1.50 or reflash 3.03 OE-C or 3.10 OE-A(2) depending on which one you had.