You will need to manually enter employees into the new/different database using the New Employee Wizard.
A good report to print before the transfer to another database is:
Reports, Employees, Details.
Select the employee and Refresh.
Click Print.
This report will provide all the information required to create the employee profile in the new database.
You will need to update both databases with any relevant leave entitlements by:
Go to the Employee Profile.
Click on Leave.
Select each individual leave type.
Click Add.
Enter the amount in the Adjustment field.
Ok to save.