pChat is working fine for me.
Why won't you use it anymore?
Check the comments at www.esoui.com there is an updated link to a version with standalone and fixed libraries which fix most of the known errors or problems within pChat:
Link to updated version of pChat from comments:
Just drop the folder in your addons folder in the eso directory and you should be good to go. If it asks to replace what is there, say yes.
The libs thing is about the only complication now. And that is just making sure you have all the ones you need. Esoui will list those dependencies. In any event, the lib files go in the same place as the addons