For some reason I can't edit my post so I reply myself
I did some modification of the original script:
wdbackup-1: backup to FTP once a day
wdbackup-6: backup the database 6 times a day, ISPconfig twice a day and the websites once a day.
Also the script checks the (local) diskspace and when running low it wil generate a e-mail which you can send to an second e-mail adres.
Al the info of the script is included in the header