i get this message everytime i tried to delete photos in the admin section:

Warning: unlink(/home/dakseno/public_html/gallery/albums/Grafix/magdalo.gif): Permission denied in /home/dakseno/public_html/gallery/zen/classes.php on line 157

Warning: Cannot modify header information - headers already sent by (output started at /home/dakseno/public_html/gallery/zen/classes.php:157) in /home/dakseno/public_html/gallery/zen/admin.php on line 82

Looks like the permissions were set wrong on the upload, however you might have done it.

Either delete them from FTP or SSH, or run the following command in a shell from the root zenphoto directory:

chmod -R 777 albums/*

How do you run it? i dont know how to do that.

Just use FTP then, it'll be much easier...