Bandit4eduWhile I understand sticking with what you know (I don't skin yet cuz the crayons mess up my screen), Icon Developer will give you the various icon size automatically with the ability to rework/replace a size if needed (like the 16x16s that turn out crappy) or pick/add custom sizes. You set it to your edtor of choice (in your case PS).
If you have ODNT or the paid ID, the size of creation goes up to 256x256.
Even if you don't use it for icon creation, it can be useful.
Create your png via PS, save it. right click on it and open with ID. Then you will have a quick idea of how the various icon sizes will look and which ones will need a touchup/rework for any particular size.
While I don't show the desktop icons myself, once in a while I use DTX with some object/icons. I like the individual sizing and it's easier with icons for that than png. But, I also prefer png for ODock.
I'm just Trolling, but trying to keep it on a positive note....