I have written a save-editing utility for FFX. To use, copy one of your saves to a flash drive with uLaunchElf. Since FFXED edits both raw and PSU saves, you can copy just the raw save, or the entire folder (paste that with psuPaste). Edit the save in FFXED, and paste it back into your memory card.
If FFXED doesn't start up when you double-click it, first make sure you have the latest version of the Java Runtime Environment installed on your machine. If you have installed Java and FFXED's JAR file is not associated with Java and some other program runs when you double-click it, run Jarfix.
Full list of features and download: