Icon images, hilites and inks

[David Bovill]

I've got some grey images that are used for icons - and I want to hilite
them with a simple coloured overlay of equivalent when the mouse rolls over
the button. I'm wandering if it is possible to use some combination of inks
and button colours to achieve this effect? The only way I can see how to do
it at the moment is either to create a coloured icon image and swap them, or
create an overlay button in front of the icon button which at least does not
require creating another set of images but seems ugly.

Any thoughts?