Forums Scripts & Popups How to change download directory with a script?

I often get spammed by a friend with alot of picture.

summer_2009_v1.....jpg
winder_2008_v5......jpg etc.

How do I change the download directory depending on what he is sending me..

Like this :

If filename has summer download to C:\pic\summer
if filename has winter download to C:\pic\winter

Any easy way to do this ?

thanks