Well the first step is to get the new firmware upgrade which can be found from Sony's Reader support site. The next step is to download the Universal Flasher 2.0 from here:
https://www.mobileread.com/forums/att...5&d=1216947954
You'll want to unzip this to a (preferably blank) SD card. The key step here is that you don't have a folder called Universal Flasher. The contents of THAT folder need to be the top directory of the card, as in, from the moment you open the card the readme.tx should be available. The readme tells you what to do from here, but I can recap that for you too:
"Usage
1) Extract the zip onto a flash card, keeping the directory structure. It's
best to use a card with not many files on it so that Reader can scan it quickly.
N.B. readme.txt should be in the root of the card, not in any subdirectory!
2) Insert the card in Reader.
3) Wait until the "Run Script" screen appears.
4) Press 5. Wait for the success message (the process will take about one to
two minutes).
5) Press 6. Wait for the success message.
6) Press 9 to reboot.
7) Extract the card.
* Using the clock display
To set the correct time on PRS-500, you need to connect it to
the PC and run the eBook Library software after each reset.
It should also be possible with libprs500 or Calibre.
For PRS-505, you can set the time in Settings or connect to PC with
the eBook Library software running.
To set up 12/24 hour format or turn off the clock, use the Settings-About
screen and the button 0 (check the status bar)."
Now if you want the enter key to shutdown and the unified font throughout you'll have to make some of the more complex manual edits those previous threads were discussing. The custom icons have yet to be integrated into the latest incarnation of this hack, unfortunately, but I'm sure it is only a matter of time.
Good luck! Let us know if you need more help.
-Jake