Chargent makes a package that allows you to use Chargent anywhere in your Salesforce Org. This includes both standard and custom objects.
Chargent Anywhere is automatically installed when you download new instances of Chargent. If you are on an older version of Chargent want to upgrade to include Chargent Anywhere, you can do so from our website.
We always recommend downloading and testing in Sandbox prior to installing in Production. Once you have thoroughly tested then install into your Production environment.