Does anybody have idea how you can add custom meta fields while making groups and fetch them informed in WordPress? I'm wondering how to achieve that without hacking the WordPress core, but when I actually do – it will not be a hindrance to update WordPress later on.

A wordpress plugin I've discovered which comes close is Wp-Category-Meta, however it does not be capable of add checkboxes as fields in Edit Groups.

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This is very helpful as customers could make certain groups "featured", and so the code may use that meta value informed to create "featured" groups in a different way.

I believe the Category SEO Meta Tags wordpress plugin can help you.

Jaz, It appears such as the wordpress plugin you mention inside your original question continues to be up-to-date to incorporate a checkbox area (included in v1.2.3)