Well, i use the coppermine photo gallery to host pics of my friends from school on my webhosting, only i have access to the ftp, but the problem is the other person i made admin is being really immature and banning and deleting other members including myself, is there any way i can delete him and change my flags without logging in on site?
Use a tool such as phpmyadmin, and browse to the database users table. You can drop that user, and make sure you are in the admin group.
Go to the banned table, and remove yourself from that table. You should now be able to log on again.
We constantly tell people not to give admin rights to others, and this is why.