Unfortunately I have no experience with Sprite, however, SPB does backup everything and also creates an EXE on the card. I'm currently using this and have had no problems.
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SPB Backup:
 - Storage card backup
- Customizable file restoration
- Scheduled backups
- Self-extracting executable backup files
- Full and custom backups
- Backup file compression
- Backup file encryption
- Desktop PC unpack tool
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http://spbsoftwarehouse.com/products/backup/?en
Resco Backup was my program of choice for my Palm Treos and they now have a Beta for WM. Haven't tried it out yet but it looks good.
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Resco Backup Beta:
Basic features:- Backup to the storage card
- Full and custom backup
- Full and custom restore
- Backup compression
- Safe encryption (uses industrial standard AES)
- Fast incremental backup
- Backup scheduling
Advanced features:- Integrity checking (Is the backup set corrupted?)
- Customizable profiles (daily/weekly backups, separate backup of contacts...)
- Compare backup set vs. device (Track changes)
- Compare two backup sets
- Manage your backup sets
- Access backup sets on the desktop with any good zipper (no extract tool needed)
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http://www.resco.net/pocketpc/backup/screenshots.asp