Is it bad practice to hack the main application_top.php file of osCommerce for making the desired changes?

Is it bad practice to hack the main applic开发者_开发百科ation_top.php file of osCommerce for making the desired changes?

I am using the osCommerce v2 and I an in the need of making some change in application_top.php file of osCommerce v2.0 its the main file of osCommerce product. please guide me is it bad to do this?

My need is I have provided the multiple submission of products at the first page with different details of each, but as I click Add to cart button generally it carries only one product with its id, now in my current situation i am available with multiple product ID, how can i proceed further to shopping cart without hacking the main application_top.php code?

Well, it depends, if you want to update the platform later, i will answer to you NO PLEASE!!

But if you understand what you're doing and plan to NEVER update the platform, HAVE IT YOUR WAY :)