First, let's say that no, it is not possible to go back a day in your system memory and restore files
Windows XP System Restore is primarily used for restoring configurations that have been corrupted and prevent your PC from starting/running correctly.
What you need is a utility like Recuva (
http://www.recuva.com/) to scan your hard disk for deleted/corrupted files and then restore them.
Thanks and good luck.