hmm, I was barely awake, maybe I didn't make sense.

What I am saying is to actually remove a line from the file. The line in the dialog { event that sets the icon.

In a start event, check for the needed image, or your image folder whatever ... If it doesn't exist /write -c the line that set's the icon.

Yeah this is pretty drastic. Doesn;t offer the user the chance of downloading the proper image folder/files.

Ok .... here's another idea. Make a custom identifier for the image.

icon 21, 535 60 64 64, $image , 0, noborder

alias image {

if (image not found) { return mirc or windows .ico path (known good .ico path) }
else { return your image path }