PS2 Save Tools

You need to add or alter the PSOne game ID in TITLE.DB to match one of your own original PSOne CD’s and send the save across to the memory card.
When you load said PSOne game the exploit kicks in and BOOT.ELF will load, the default loader (PS2Link) can be replaced with a loader or small program of your choice

Note: The Naplink client previously linked in this article is no longer available and has been replaced with a version found on the Internet Archive.
This FAQ is maintained for archive purposes only.

Naplink tries to load files from the CD, homemade CD’s are not readable on a non mod chipped PS2.
We can get past this by using PS2Reality’s MCLoader and creating an install script that loads the required modules.

Instructions

1. Download MCLoader and Naplink (PS2 files and suitable PC client)
2. Extract the contents of the PS2 Naplink zip to a folder, you will be using the files found in theCD folder
3. Rename npm-usbd.irx to NPM-USBD.IRX and npm-2301.irx to NPM-2301.IRX
4. Using Winrar version 2 (It is vital that version 2 is used, version 3 will not work) create a rar file named naplink.rar containing naplink.elf, NPM-2301.IRX and NPM-USBD.IRX
5. Open a text editor and paste the following:{}{NAPLINK} 
6. Save this in the same directory as the naplink files as mcupload.txt
7. Open a new document in your text editor and paste the following:
   
   TITLE Naplink
   RUN naplink.rar
   LOAD rom0:SIO2MAN
   LOAD rom0:MCMAN
   LOAD vmc:/PS2REALITY/unrar.irx
   REN cdrom0:NPM-USBD.IRX;1 unrar:128KB[NPM-USBD.IRX]vmc:/PS2REALITY/NAPLINK/naplink.rar
   REN cdrom0:NPM-2301.IRX;1 unrar:128KB[NPM-2301.IRX]vmc:/PS2REALITY/NAPLINK/naplink.rar
   
   Note: The text may be wrapped to fit your screen, REN and vmc: are on the same line not seperate lines in both cases. If you copy and paste the entire text in bold you should have no problems
8. Save this as copy.cnf, do not worry if the .cnf file extension is not shown in windows and do not try to add it manually, you’ll end up with a file with a double extension.
9. Place mcloader.elf and unrar.irx in the same folder as naplink.rar
10. Start PS2VFS and set the Media Path to the directory that contains naplink.rar and the other files
11. Run MCLoader 1.10 on the PS2 and press the Launch NET button found in the Configure IP menu (Be sure to set up the IP config correctly if you haven’t done so yet).
12. Enter the Memory Card Manager Options screen and press Install Files using PS2VFS
13. After the operation completes Naplink will be installed on your memory card, simply goto theApplications In The MC option and select it from the list

A useful guide published was published by Jules, however the website is now offline. There is a copy located on the Internet Archive here

No, Marcus R. Brown AKA mrbrown found and created the original files for the exploit.

If you install the media player to the memory card it installs an OGG player in a sub directory. It is this sub directory that is stopping you from deleting the save, you must first delete all sub directories using MCLoader’s Memory card manager before deleting the save in the PS2 Browser.
Similary, when you install an application using MCLoader it generally resides in a sub directory, these also must be removed before deletion.

For a fast fix use the Xport software to delete the save and sub directories in one go