Hi .. well blue voda is the website builder and for a forum you do not use blue voda .. You can host a forum with voda host and voda host also offers you installation of a forum through your control panel, the fantastico icon, the installation is pretty well automatic .. you need to decide where it is you would like to install it though .. as a main which would bring you right to the forum or you can install as a sub.
You can either install a forum in your main directory or you can build a website with blue voda and install the forum in a sub-directory off of your main website ..
You can see how I have done things on my own .. I have set it to link off of my website ...
www.bluevodachat.com
You can read and discover and get help right here
http://www.angies-cyberscripts.org/forum2/
As well, the gentleman here also provides installation and mod installation .. if you so desire to hire him ..