After setting up Git hub desktop and cloning the repo, installing PCSX2 and downloading an Iso of the game, you'll want to use a 100% save file to test some stuff.
It's really usefull when we want to validate all the translations of different elements of the menu or just validate some Skits (Katz village).
1) Download the save file here (link1 or link2)
Link 1 is a safe file where you start close the Kats village. Link2 is an alternative in case Link1 doesn't work anymore.
2) Find this folder for PSCX2 emulator and put the save file in there
Path should looks like this My PC / Documents / PCSX2 / memcards
3) Open PCSX2 emulator and select Config -> Memory card
4) Find your memory card (probably in the unused section) and click insert. You'll be asked to select a Target memory card, just select port 1.
5) Now if you open the game, you should be able to see the 100% save file
It's a good idea to use this memory card as your main card and just create your new game under it. This way you avoid to always switch between 2 memory cards to test stuff