EDIT: Made it work again, edited the XML file that needs to be inserted in Fiddler. Just replace it with the old one and it should do the trick.
New update came up surprisingly fast for us, because of the new native Vita hack and now many of us are waiting to test it out but still want to get access into PS Store and Download the games that we already own without updating tp 3.52 and killing all the hard work that has been put for us in Rejuvenate hack. That's why I came up with a kind of simple solution that will trick your Vita of thinking that it's already updated to the highest version. Let's begin!
P.S. Also, this method will prevent Vita from ever downloading the latest firmware, making it safe for you to use your Wifi on Vita.
Requirements:
- PSP Vita
- Home Router (TP-Link, Jetspeed, Huawei, etc.)
- Computer with Fiddler running (Download it Here)
Step 1.
What we basically want to accomplish is to set up your PC as a proxy tunnel between the Internet Connection and your Vita so we can "forge" what Vita gets back from its update servers. To do that, you will first need to Port Forward port 8888 on your router to your PC's IP Address. I've uploaded a screenshot from my router which is TP-Link and should be the same (similar) on all TP-Link routers.

Step 2.
After you're done with that, start your Fiddler and go to Tools > Fiddler Options and set them up as shown in the screenshot below:

Step 3.
Now it's time to set up our Vita to use our newly created proxy and redirect all traffic through Fiddler. You can do that by connecting to your WI-FI with your Vita and then go to Settings > Network > WI-FI Settings > (Select your Internet Wi-Fi connection) > Advanced Settings > Proxy Server > Set it to Use and for Address put the IP Address of your computer you inserted before in your router and the port should 8888. After that, you should be all set and your PC will be working like a proxy between your Vita and your Internet Connection.
Step 4.
Now comes the essential part which will actually block updates and allow you to use the PS Store. In Fiddler go to AutoResponder tab and then click the Add Rule button. At the bottom of the Fiddler you should see two input text boxes in which you must enter the following:
- request URL of the update xml file
- our "forged" update xml file (which is actually just an older version of Sony's original update xml file)
To get the request URL (I couldn't post mine since it will vary from device to device and from country code), in the Fiddler, first make sure that in the File > Capture Traffic is selected, then on your Vita, go to Settings > System Update > Update using Wi-Fi (DO NOT PRESS NEXT OR CONTINUE AFTER YOU GO THERE, PRESS CANCEL, OR VITA MAY BEGIN TO UPDATE ITSELF) and right after you've been there in Fiddler you will notice URL similar to this one: http://fuk01.psp2.update.playstation.ne ... telist.xml. Select that entry and in AutoResponder tab click Add Rule. It should right away generate a new rule in which the first text box will be filled with something like "EXACT:http://" while the other one will remain blank. In order for everything to work, you must supply a "forged" update file which you will copy from below, insert it in your notepad and save it as lets say update_3.51.xml.
Notice the "uk" language code in the XML i provided below. You will need to change the "uk"to "us" or "jp" depending of your location.
Code: Select all
<?xml version="1.0" encoding="UTF-8"?>
<update_data_list>
<region id="uk">
<np level0_system_version="01.600.000" leve2_system_version="03.520.000" level4_system_version="03.520.000" map="03.520.000" />
<np_d level0_system_version="01.600.000" level2_system_version="03.520.000" leve4_system_version="03.520.000" map="03.520.000" />
</region>
</update_data_list>
- Enable automatic responses
- Unmatched requests passthrough
These two have to be checked or else it will not work. To sum it up a bit in one screenshot:

And that's it! If everything is done right, try going to System Update again and it should say: The latest version of the system software is already installed.
EDIT: Made it work again, edited the XML file that needs to be inserted in Fiddler. Just replace it with the old one and it should do the trick.
Kudos! <3
