Convert a Wordpress Plugin to JOOMA plugin

We need Joomla and wordpress expert. We are a service that let wordpress users add a chat to their blog (iframe), We need the same for Joomla. What we Need? ======================== 1 – Create the Joomla plugin 2 – Write installation instructions in HTML format (with print screens, for each step). (see elaboration in the word attached) Looking forward to your bids. Thanks in advance!