: Right-click on Part 1 and select "Extract Here" using WinRAR . It will automatically pull data from part2.rar and the remaining segments to create a single setup folder.
If you are modding , the "AIO" likely refers to the Ultimate AIO Kits V2 or similar packs which add hundreds of authentic kits, minifaces, and fonts.
: These mods require the FIFA Mod Manager (v1.1.3 or higher). Process :