Advanced group permission

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Hi,

I have modified the advanced group permissions in concrete5, so that it's possible to add sub groups (at least one layer), and the sub groups are inheriting the parent group's permissions. Since most of the code was under the /concrete folder, I was wondering if it's possible to include those changes in a package and release it on the marketplace.
Thanks

 
Mnkras replied on at Permalink Reply
Mnkras
it is possible, you can copy the files from your package to the root folders (/helpers etc not /concrete/helpers) on install, and remove them on uninstall
BalazsPH replied on at Permalink Reply
thanks for the quick reply.
so it seems there's no restriction on modifying the "core" files.
Can I directly modify eg.: the groups table as well ?