virtualbox.org

I am posting here because I have tried searching for a solution and have been unable to find it. Most likely because I do not know what to search for.

I would like to create a virtual network using virtualbox.

I would like to create a VM application server, a VM file server, and 2 standard desktop VMs. The 2 standard desktop VMs should be able to connect to the VM application and file servers as if it were a real network.

I am using VirtualBox 2.0.4. Can someone please point me to the right direction as I am not having much luck with google when searching for stuff like "virtualbox virtual network".

Set the network type to "Internal Network" and give them all the same network name.

I now have 1 VM as a server and 2 VMs as standard desktop PCs. I have changed network type to "internet network" for all 3 VMs. Now, how do I get them to talk to each other?