So, for example, I need to be able to add a net-30 payment option to the eCommerce package that is only visible to a user when an attribute is set to true by an admin... So, I'll probably end up having to override some functionality.

Since I'm new to concrete, I would like to know if there is a standard way to do this in the most future proof manner. My thoughts as of now are to copy the package and rename it as "backup.package_name," and when an update comes along syncing the changes with the backup and then merging the changes into the hacked package. Am I on the right track, or am I missing anything?