Ok, then I suggest changing group permissions to this ftp user you want...you probably already have a group for ftp...check /etc/group, you may see something like:
So add the user you want to ftp (i'll assume cgoff here) in /etc/group:
Now cgroff is member of group 'ftp'. So now you need to chgrp all your htdocs:
# chgrp -R ftp /var/www/htdocs/
Now cgroff can edit/delete files in htdocs...
Note that 'ftp' is arbitrary, you can create a new group if you want....just follow same instructions to add your user to the group, and chgrp the files.
sorry, you need to 'chmod -R g+w htdocs' as well.