need a plugin

Hi, I am new to elgg, and need help.  I would like to add Envolve chat to my site (not live yet), and it has a code to add to the <head>. Some sites already have plugins for it, but I cant find one here.  It is a nice chat service, which is free up to 20+ simultaneous chatters then has paid.  It is a private one on one chat with multi chat too.  I need the private chat.  I do not wish for a chat room-that is the only thing available here for elgg 1.8.2 that I found.  I am not a coder or programmer, and wondering if this is possible?  I do not know where to find the <head> on elgg.  It is difficult.  Anyway, I thank you in advance.  My email is mistycorners@gmail.com.

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