Customization on Free call for price add-on

[WorkingHard]

Hello,

 

I need to do just a slight customization of Free call for price add-on found here:

 

http://addons.oscommerce.com/info/134

 

1. Entering 444444 as price I want to achieve 'Sold out' - same result as this add-on returns when entering '0' (zero) as stock for some product.

 

2. I don't want price to shown when product have 'Sold' Out' state.

 

Can someone share some ideas on how this can be done? This function already exist in this add-on, but I need a different way to trig that function.

 

Thanks in advance. :thumbsup:

 

Cheers!