ScanReg

Windows98 has a DOS mode registry scanning program
Several switches can be used with this program

/BACKUP - Backup the registry and related system configuration files.
/RESTORE - Choose a backup to restore.
/OPT - Optimizes the Registry by removing wasted space. This will be done automatically by Win98 if there is more than 500K of wasted space
/FIX - Repair the registry.
/COMMENT="" :- Adds the specified comment to the CAB file while backing up.