Need to hide prices with a 0.00 price

I am in a position where I receive CSV files to import products into the DB. It's very unlikely that the client will update thousands of prices one at a time via the CMS.

Due to poor integrity of their data in the CSV files some prices are missing for products, and as a result, they get set to 0.00. Obviously any product being sold at that price is a no no, so I need to hide the product until it's given a price.

I am trying to add this to the query of the results page and product page:

AND ProductPrice <> 0.00

but it's not working.

Where am I going wrong?

Thanks

Mat

Just to clarify, I do know of the 'Make Product Live' option in the CMS, but to do that to 683 products out of thousands is going to be difficult to achieve once. To do it each time I do a batch update will be painful...

you will need to add that change the webassist/plugins/catalog/results.php, webassist/plugins/catalog/results_grid.php, webassist/plugins/catalog/basic/results.php, and webassist/plugins/catalog/details.php pages