[Zope] PIL and Filesystem

Hello, I'm using PIL to convert bmp and tiff-images to jpeg. After conversion they should be added to Zope. My problem is that for conversion, I think, I have to safe them on the filesystem. Zope's security policy doesn't allow me to delete files with an external method. Am I forced to do a cron-job? Isn't it possible to change the format in another way?? Thanks very much!! I've heard that's easier to stream the images and convert them on the fly! Any hint?? Thanks. -- Sent through GMX FreeMail - http://www.gmx.net