We all make mistakes. Once you get your phone back to a rooted stock OS state, I would recommend getting ROM Manager (ROM Manager - Android app on AppBrain) from the market to make backups of your boot images before you flash anything else to the system. Any time I add a theme or change ROMs, I make a backup just in case. Also, I would recommend getting Titanium Backup (Titanium Backup ? root - Android app on AppBrain). This tool allows you to backup and restore your applications and data.