Joomla!®Plug

I´m German - i hope you understand my english.
1 year ago i didn´t knew what a cms is.
i don´t know joomla 1.0.x
i learned joomla this year direct with 1.5
i made a homepage for a school: www.anne-frank-realschule-montabaur.de
i buyed joommlacloner unlimited last week for backup
i installed the part xcloner for the backup
the manuel backup works good

but i want a automatik backup each week (or day or ...). but my provider didn´t allow a cronjob.
is there an other possibility?
can i start a link from my pc at home each week automatikly and the backup starts then?

thanks,