Icons in front of routines?

[GT6Steve 4]

On a previous job we had all of the many routines written by five programmers. It was fun because each of them had different styles and techniques. I learnt a lot from the exposure to the variations they'd left behind. One of them had a strange set of icons, like flowers, in front of the routines in the organizer tree. I didn't have time to figure out his thinking but I find it intriguing. Does anyone know how the icons can be changed? And why would anyone bother?

[Ken Roach 194]

They probably used a utility called "Reshacker" to change the image files embedded into RSLogix 500. I've done that to change the animated "rotating ladder" icon, just because it was fun.