favicon.ico file conversion

[sims]

I am looking for a way to get favicon.ico images into my Rev project.
( like this one:  http://www.nytimes.com/favicon.ico )

I want to do this on OS X & Windows.

Anyone know how my application might convert them to .png or
some other image file so I can then get them in the application?

I know how to convert them in OS X Preview, but need something for
both platforms and not require the user to take extra steps - I want to get
this done via my application. I want to use these for button icons.


sims