Default value for number on custom fields

Hi

Love the code and have been playing with it for the last few months. Just a couple of queries that i cannot solve

(1) I add a new custom text field (number). Calling it ‘Max Venue Capacity’ for example and making it non required as some venues do not have this info. If the listing does not fill in this field it defaults and displays on the page (and database) as 0. But this is not correct as obviously the Max Venue Capacity is not 0. its strange because on the preview of the listing it does not show. But once they submit it and have not entered anything, it updates to 0 in the database and then displays as 0. I can go into the database and update all 0 to null. And then it will not show but that is not a permanent solution. Bascially if the customer adds nothing then nothing should be added to that field, but it seems to update it to 0 instead?

You can see an example here (if you go to the capacities tab) http://whichweddingvenue.co.uk/venue/wolverhampton/connaught-hotel-wedding-venue/

(2) How can i add the widget GD > Search to the Top Section of the Add Listings Page. So it shows here http://whichweddingvenue.co.uk/add-listing/?listing_type=gd_place . I can only see a GD > Add listings Right sidebar, not top

(3) Would it be possible to add http://whichweddingvenue.co.uk to your showcase?

Many Thanks

David Walker

(2)