How to have Jpgs saved in CMYK mode thru Flash?

In flash I am doing a interactive CD- I have buttons that call different
things. Some are pdfs, some or eps’s but the majority are Jpg’s.

I use the geturl command for all… On the pdf’s and the eps files-it works
fine it opens and asks if you wish to save it… That’s what I want. However
on the jpgs- it doesn’t unless I make it a rgb then it just shows the image
in the browser- I want to have it in cmyk and ask if you wish to download-
how would I do this?