To view them? in a folder, or through mIRC??
as you can open the folder containing all these icons, and right mouse click> view > thumbnails which will show you all the icons in the folder, there are also a few other "view" options which will also achieve this, just in a different format, however, if you are wanting to see them in a dialog through mIRC, then just create the dialog, and make a list of all your icons, and when you click an item of that list, the icons appears..
just use the /did -g name id [n] filename
to change the icons, UNLESS you want to get into mdx.dll/view.mdx where you can create the list, and show the each icon beside the icons name in the list..... if you understand what i mean, but thats a whole different section, and you would need to learn mdx.dll to achieve this... choice is your