Ok, thanks anyway...
In the meanwhile i found what i was looking for on another board.
For those that dont know what i was talking about:
On Unix you can use "cron jobs" using a crontab file. Its kind of a task scheduler.
You will be able to execute CGI scripts automatically/periodically without starting it manually via a web browser.
Make a search on words like cron, php, execute, automatic... on google.com f.ex. and you will find lots of info.