Commerce isn't core, but hacking contrib has similar problems to hacking core (you just may have a better possibility of deciding not to update that module).
Depending on what changes you want to make, a module that works with commerce is likely the best option, and with _alter hooks, there is a good chance you can reach in an change what you want (you don't describe the types of customization you want to do).
On 6/14/14, 8:36 AM, Muzaffer Tolga Ozses wrote:
Never hack core and roll your own modules as your modifications will be undone when/if you update.
On 14 Jun 2014 07:27, <techlists@phpcoderusa.com mailto:techlists@phpcoderusa.com> wrote:
Hi, I am looking at customizing Drupal Commerce. I've been a LAMP dev for a while however I am very new to Drupal. I have a ton of questions. First let me say thank you for all your help and guidance. I am wondering the best way to proceed? Hack the existing commerce modules or create other modules that interact with the existing commerce modules? Thanks again for all your help!! Keith -- [ Drupal support list | http://lists.drupal.org/ ]