add filefield as image style

hi aaron,
i would like to add a file field (for downloads) to an image style, so that in the configuration list of image styles
there would be the option 'filefield' for instance or 'zip file for download'.
i'm making a website with several screensavers for free download and i would like to attach download links to views galleriffic.
the views galleriffic gallery shows the screensavers that are available and i would like to add a zip file containing a mac and pc version of the screensaver + some info on how to install the screensaver.
this is the step by step set up of a views galleriffic gallery i used in drupal 7: http://drupal.org/node/1578774
in order to be able to upload an image to be made available for download it's necessary to have the option of selecting an image style that is a file field but it has to be 'converted image content' (otherwise it doesnt work with galleriffic >integrated in the slideshow >download link under the picture of the slideshow).
do you know how to do this?
this would allow for me to make a website with all functions i need in 1 page. that would be awesome.
hope you can help me.
best,
ciao,
blacktigerclaw

ps in this version of the galleriffic gallery there is a download link connected to the separate slides but it points to the original image (also an image style available at the configuration).