Pull month and year to get graphic title

[attroll]

I am looking for a hack that will let me set sponsors for a module on my frontpage. What I have is a sponsor block and I only allow one sponsor at a time for the whole month. But I have 6 months worth of sponsors paid up into the future. What I want is to save a graphic file ahead of time buy month and year somehow so it will get the current sponsor and change it when the next month comes up. One that might look something like January2004.jpg, February2004.jpg, ect, January2005.jpg and on and on. Can this be done?

I hope what I am trying to say is making sense here.