How do i put the imagedir_XXX to point to a different server ?

[TheRageIsOn]

I have a image server specially designed for serving images ( and only images )
what could i do to put the imagedir_XXX to point to that server ?
I tried to enter the value in the stylemanger but not all images are showing up ?

What am i missing?

For example, i like to do this:
Instead of having the images loaded from the same server stored in "images/misc"
i like to have them "images.imageserver.tld/images/misc"
how can i do that !