I'm trying to remove some thumbnail files that were created by an auto-thumbnail script and I'm getting some odd things.

'rm *' produces:
rm: remove write-protected file `bikes 001_thumb.jpg'? y
rm: cannot unlink `bikes 001_thumb.jpg': Permission denied
rm: remove write-protected file `bikes 002_thumb.jpg'? y
rm: cannot unlink `bikes 002_thumb.jpg': Permission denied

The files and directory are owned by 'nobody' so that the webserver can write to them. How can I delete these files? I cannot use chown or chmod on the files, and I do not have access to the root account. Even though I created these files and had already manually changed permissions on them, am I going to have to have root delete them?

Thanks.