I know similar things have been asked a thousandfold, but I can't seem to figure it out..

I have recently started renting a VPS. It runs DirectAdmin. I created a reseller account in the admin account, and created a new user (with FTP account) with the reseller account.

I logged in with FTP as the created user and uploaded a zip file and a php file which will extract the zip. But when running the script in the browser I get "Permission denied" errors however. Probably because Apache is not in the same group as the users FTP account.

Now my question is: How can I solve this once and for all, so that I don't have to do it again for every new user account I create through DirectAdmin?