Uh...I'm not entirely sure what you mean.
Those Iconplz are the accounts just used for their avatars, right? Create a new account, and upload the icon. Then, for the icons to show around the DA, type :icon___: (the line is where the DeviantArt name goes) in certain comment areas. It works for every DeviantArt name on the site. Although, icons do not show in signatures. If you're looking for the emoticons, then there should be a box next to the comment area, and emoticons show up at the bottom right.
Example: :iconcaptainlinebeckblack: (Eh, its my screen name).
If you're talking about making one (like, you made a plz account) just upload the picture you want shown every time someone uses it as the avatar
If you're talking about how to use it here's how (I'll use a simple one as an example) : icon glomp plz : Now take out the spaces. You must always have :icon(text here)plz: If you have any more questions, please ask ^^ Hope this helps
It's easy if you've done it before.Just type the word 'icon' then the name of the emote,then add 'plz' to it.But don't space them out.Here's an example: :iconlegaspplz:
say.. if you wanted to do the facepalmplz icon.
you would just type in the message box on your/their wall and type :iconfacepalmplz:
or for any icons other you just have to say :icon....: then then name of what the icon says.
if you don't know what the icons term is.. place your mouse over the icon that you are basing it on and it would say facepalmplz
so you just need to say :iconfacepalmplz: