First, there are two ways on patching your MHP3rd ISO.

1. Download Monster Hunter Portable 3rd Psp Patch Italy
2. Download Monster Hunter Portable 3rd Psp Patch Italian

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There's the PRX plugin and using a patcher on the ISO. I highly suggest using the PRX plugin because it is easier to download, copy and replace a small

1. For Monster Hunter Portable 3rd on the PSP, a GameFAQs message board topic titled 'Team HGG patch.'
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patch update (around 9Mb) than the whole patched iso (1Gb+).
NOTE: I also added the MHP3rd Patcher v1.6.2 since there are a lot of people that can't make the plugin to work. I don't understand why they are having difficulty though :hmmm:
Secondly, make sure that you use an untouched ISO for patching.
I think you can make use of a previously patched ISO but using an untouched version is recommended.
One way to know that you have an untouched ISO is by looking at the size of the file. The size should be exactly 1,207,140,352 bytes.
Lucky for you I have included an Untouched ISO so you won't have to look for one anymore.
Untouched ISOPassword: halcyonhiatus


Download Links
Part 1
http://adf.ly/6JyWE
Part 2
http://adf.ly/6JyWF
Part 3
http://adf.ly/6JyWG
Part 4
http://adf.ly/locked/6JyWI
Part 5

Download Monster Hunter Portable 3rd Psp Patch Italy

http://adf.ly/6JyWJ
Part 6
http://adf.ly/locked/6JyWK
Installing the Plugin!
Monster Hunter Portable 3rd Loader(Developed by Codestation)
Password: halcyonhiatus
Instructions:
Connect your PSP to your PC via USB.
Extract the archive (including the folder) to the seplugins folder located at the root of your memory stick. If the seplugins folder doesn't exist, create one.
To enable the plugin on your PSP, open the seplugins folder and locate game.txt and open it with Notepad. Again, if it doesn't exist create one.
Copy one of these lines and paste it in game.txt

Download Monster Hunter Portable 3rd Psp Patch Italian

for PSP 1000 to 3000:
for PSP Go:
!English Patches!Password: halcyonhiatus
Latest Available Patch: MHP3RD Patch v3.8 by Team Maverick One
NOTE: The MHP3rd Patch v3.8 has two Data.Bin files. The one with JP is for patching pre-patched ISOs to the original Japanese texts.
If you are unsure on whether your ISO is untouched or not, you may use this with the MHP3rd Patcher v1.6.2 to patch it all back to the original texts.
Older Patches:
MHP3RD Patch v3.7.2 by Team Maverick One
MHP3RD Patch v3.7 by Team Maverick One
MHP3RD Patch v3.6 by Team Maverick One
!Installing the Patch!
Once the plugin is successfully installed, all you have to do is extract MHP3RD_DATA.BIN from a patch download to the plugin's mhp3rd_loaderfolder.
When done, these files have to be in your memory stick:
After making sure that the above files are present, you have to reboot your PSP. Only then can you finally play the game
NOTE: It's safe to leave the plugin enabled when using other games. You can just let it stay enabled and it won't bring you any harm.
If you have done everything by the letter then congratulations!
If not, then goodluck finding your mistake.
!Updating the Patch!
There's a new patch! What do I do?
To update the patch, simply overwrite the old MHP3RD_DATA.BIN file on your PSP with a new one and relaunch the game. Done!
(This applies if you used the PRX plugin to patch your game. If you used a patcher however, I don't think it will work.)
PS. To everyone having troubles on making the plugin to work because you didn't pay attention to your studies and as a result has difficulty understanding plain English, I give you
MHP3RD Patcher v1.6.2
Password: halcyonhiatus
!Using the Patcher!
Extract MHP3rd Patcher v1.6.2 .exe
Put the Patcher and the latest MHP3rd_DATA.BIN in the same directory.
Run the Patcher and locate your untouched MHP3rd ISO.
Let it patch. (It shouldn't take more than a few seconds)
After patching, mount your PSP to your PC via USB cable.
Copy the patched MHP3rd ISO to your ISO folder and voila~ You are done.

Any questions and problems? Feel free to comment and/or PM me.
Credits to Team Maverick One for their efforts on this project!

GAME INFORMATION
Game Name	Monster Hunter Portable 3rd HD ver.
Original Title	モンスターハンターポータブル3rd HD ver.
Region	Japan
Console	PlayStation Portable
Game Release	2011-08-25
Genre	Action RPG
Publisher	Capcom
Languages	English Patched
Image Format	ISO
Game ID	NPJB-40001
Downloads	69,792
Users Score	Rating: / 5. Votes: No votes so far

Description:

Monster Hunter Portable 3rd HD ver. (モンスターハンターポータブル3rd HD ver.) is a Action RPG video game published by Capcom released on August 25th, 2011 for the PlayStation Portable.

This is the English Patched ISO of Monster Hunter Portable 3rd HD ver. released by Team Maverick One. It’s the 5.0 patch, the latest one before they shutdown their website.

This HD version is a remaster of the PSP version for PS3 but for technical reasons this game can be emulated with PPSSPP. In fact THIS ONLY WORKS ON PPSSPP. If you want to play on a real PSP console you have to use the regular, non-HD MHP3rd.

The English translation is not 100% but most of the useful things to progress are translated. If you want the patch alone it can be downloaded from romhacking.net.

Screenshots:

Monster Hunter Portable 3rd HD ver. (English Patched) PSP ISO Download: