I'm a big fan of customization. Hardware, software, etc. so when I found some of the details on hacking the kindle I jumped all over it. I also do what I can to be fair and not cheat the system so hack away, but don't steal (even if the bill isn't worth it). Enjoy the octokindle resources.
Download everything you'll need at mattgraham/octokindle via GitHub. These modifications should work with the v5.1.0 firmware version of Kindle Touch. Make all changes at your own risk. (It was a very smooth install for myself) I am just the screensaver orginizer if you have any questions hit me up on twitter: @mattgraham
Huge thanks to @cobyism and @dreww for getting things rolling on this, much of this content is because they got it started.</p>
Feel free to submit pull requests with new octocat screensavers. I'll accept and reject them based on my personal biases, and taste in design.
Removing Advertisements
There are ways on the interweb to remove the advertisements from your kindle. However, my recommendation is, pay for them. Goto "Manage Your Devices" tab in your amazon account and unsubscribe from special offers. Its annoying I understand, but the right thing to do.
Plug in the Kindle via USB and copy all the files and directories contained in the downloaded zip file (data.tar.gz, ENABLE_DIAGS, diagnostic_logs) directly to the Kindle’s USB drive’s root.
Safely remove/eject the Kindle from USB and restart it (Menu → Settings → Menu → Restart)
Once the device restarts into diagnostics mode, select “D) Exit, Reboot or Disable Diags” (by tapping on the appropriate entries)
Select “R) Reboot System” and “Q) To continue”
You should see the Jailbreak screen and the device should restart back into diagnostics mode; Select “D) Exit, Reboot or Disable Diags” again
Select “D) Disable Diagnostics” and then “Q) To continue”
Once your Kindle reboots into the normal firmware, it should be jailbroken. At this point you can safely delete the diagnostic_logs folder on the Kindle USB drive.
GUI Launcher
To manage extensions on your jailbroken Kindle, it’s best to use this thing called the GUI Launcher. Here’s how to get it:
Copy the file named “update_launcher_1.2.1_install.bin” to your Kindle. Make sure to place it directly in the top-level directory of the USB drive, not in the “documents” subdirectory or in any other subdirectory.
Safely eject the Kindle from the computer.
On the Kindle, choose Menu → Settings → Menu → Update Your Kindle
The device will add the GUI Launcher to your Kindle, which you can access by choosing Menu → Launcher.
Custom Screensavers
The default screensavers aren’t terrible, but the entire purpose of custom screensavers is to make your kindle, yours. To do this you need to run terminal commands on the kindle. The easiest way in my opinion is to use the XTerm extension instead:
Finshed! You’ll be able to use any images you like as the screensavers on your Kindle by uploading them in the ‘screensavers’ folder that will now appear on the Kindle drive. In order for the screensavers to be recognized however, there are some requirements you need to adhere to:
Screensavers must be PNG images
They must be 600px by 800px grayscale images.
All image names must be: ‘bg_xsmall_ss##.png’ (the ## are two digits starting at 00 and increasing sequentially, i.e. bg_xsmall_ss00.png, bg_xsmall_ss01.png, etc…).
Octocat Screensavers
The purpose of this repo is to fill your kindle with octocat screensavers. Check the ‘/screensavers’ folder in the octokindle repo4 for my collected Octocat images.
Credits
Again thanks to @cobyism and @dreww for putting some of these details together and many thanks to the following sites in which many of the instructions and files above were taken from: