Setting default permissions?

[angst]

Hello,
I'm wondering if this is possible and if so, how it can be done.

I upload a number number of image files via ftp, I then need to be able to edit/delete image files via php script. the problem is that these are two different sets of permissions. ftp vs. apache.

so I'm wondering, is it possible to put default permissions on the a single directory, so that any files uploaded to this directory get the new set of permission added automaticly? this way I don't need top reset them with the ftp client everytime I upload, also I can't do chmod with php because I'm on a shared server.

any ideas?

thanks in advance for your time!
-Ken