First a little background of where I'm coming from. I'm trying to set up osCommerce (an open-source ecommerce solution) with a little tweakings on the minimum amount of items that customers can order. For that I need a very specific and minute change in a PHP file (osCommerce is almost entirely PHP). I know what I need to do, but due to my inexperience in web programming (or any programming languages for that matter, I don't know how to implement it).
Now since the issue is related to CMSes I first went Pro Webmasters, and the FAQ stated that programming questions were dealt with on StackOverflow. This is where the niche issue comes in - it's just a tiny tweak I want to ask about - I'm not sure if it will fit in to the programming nature of the SE. And to top it off, I feel uncomfortable to ask question for commercial interests, even if I'm just helping dad out.