DISCLAIMER:
These steps are only my GUESS. I haven't tried anything here.
Take a backup of all your files using FTP. Use the admin control panel to take a backup of the database then download this file too.
After you've moved do a clean install of 4images. This should set you up with an admin login assuming you've already created a new database. Upload your backup of 4images, access the admin control panel and restore your database backup file.
Sound about right?