Is there any GOOD raknet tutorials for C++? yes, I know http://www.jenkinssoftware.com/raknet/manual/index.html is really good, but all of my group members need to be able to understand what the code is doing, so a long process of learning the small parts of code they give you isn't going to be easy for all our team members to access...
all of my group members need to be able to understand what the code is doing,
The fact that you ask this seems to indicate that the group members aren't actually fully educated programmers yet. It may be that what you need is to educate your group members to be programmers, rather than educate them in a particular library.
There's also all the particulars about networking in general -- how does addressing and routing really work -- which is another pre-requisite that will trip you up if you don't understand it thoroughly.