Thanks Terry. I had done that copy-paste in 2 sessions trick years ago to merge someone else’s custom icons and I had forgotten about it.
Once I copied the icon out in WF 5, I was able to paste it in to Creo 2. I pretty sure I could have done this in 2 sessions of creo 2 but I haven’t launch WF5 in more than I year, I thought I would give it a try anyway, just for fun.
I checked my startup folder (where I have my creo_parametric_customization.ui, thanks to David Haigh’s instructions) and it now has an updated creo_parametric_customization.ui, which is where I would expect the customizations to be saved…duh!!!