Create Memory Card: Only required if you want a fresh memory card, ignore if you are going to overwrite your save.
- Open PCSX2: Go to Settings, Memory Cards, Create (8MB). Name the file something you will remember. 
- Right click on the file you just created and pick "Use for slot 1".
- Start the PS2 BIOS. and open the memory card in Slot 1. This will format the memory card.

Inserting save file:
- Close PCSX2 if open.
- Use MyMC [http://www.csclub.uwaterloo.ca:11068/mymc/](mymc download link) <editor's note: using older version for easier gui usage, as for ++ i'm only seeing pipx install instructions> to open the PCSX2 .ps2 memcard file - typically in Documents/PCSX2/memcards/Mcd001.ps2. 
- Import the provided .max save file from our #memory-save-files channel via clicking on the "Import" button.
- Only one Jak X save can be present per memory card. If you are not using a new memory card and wish to keep your previous savegame, create a backup copy of the .ps2 memcard file.
- Save file and **close** the MyMC app.


You should now be able to open Jak X and load the 100% save profile. If not, try ejecting and reloading the memory card from within PCSX2.