How to set time span of grab (number of days)

Hi, I have just got Webgrab+plus up and running for the first time. Very pleased that I can now get epg. I have one question; how do you determine the number of days to grab from the site? At present I am getting about 24 hours, but was wanting to get a weeks worth of data if possible.

Using tvguide.co.uk.ini and oztivo.net.ini

Many thanks,

Tim

New Zealand