There is no problem to change the code, but I can't find the file where modify the code.
I used cs-cart for the past two years. During this time I stepped into a lot of issues and very dubious implementation procedures from a logical point of view.
The user should have an easy and quick navigation experience.
A paid cms as cs-cart should ensure that and more.
For my personal experience I will recommend it to anyone. I am very sorry but me and my company are seriously thinking of moving to another system.