Instructions
Turn on your Sony PlayStation 3 and allow a few seconds for it to boot.
Select "Game."
Choose "Memory Card Utility (PS / PS2)."
Select the "Create" option for a Playstation 1 memory card. This will create a new, virtual PSX memory card on your PlayStation 3's hard drive. When you go to save a game in a PlayStation title that you're playing, the game will recognize this virtual memory card as if it were a physical memory card inserted into your old PSX console.