IP. Converge is s standalone application, meaning that it can be hosted on a totally different web address and it can still work with your forums. What you want to do its create a folder where you want to contain it. So call it converge, login, client, customer, ect.
1) Create a folder with a name, where you store the actual application
2) Upload all of the upload folder contents
3) After its setup, you need to add IP. Board or a similar product to its application directory in the Converge ACP
I made some documentation a while back that you can take a look at, it might help you.
Converge Docs