7
ok, now before you do this, make a back up! You have been warned!
make sure that the frameworks and xoopseditor are installed and up to date.
delete the module (your old newbb module) using an ftp or file manager application.
upload the new version of CBB (titled newbb as was the old one) using same ftp app.
goto admin>system>modules and click the update button next to newbb
cross your fingers and see if the forums are still working.
(maybe better to wait, actually, until someone else says this is ok. It's just what I'd do in your situation)
Never let a man who does not believe something can be done, talk to a man that is doing it.