Hi, thanks for the quick reply.
It seems to be working. There is just one issue I found straight away - I'm not sure whether it is a 'bug' with this modification or with Infopop's board, but here it is:
If you delete the "1" from the "Newer than" box (i.e. leave it blank) the search is performed on all possible dates, whereas it should in fact be restricted to the maximum date range (in my case it is 6 months)
Cheers