[Setup for Multiplayer]

Before I start attempting to create a multiplayer game. Is there a tutorial on implementing multiplayer. I do not want to sound dumb but I see examples on connecting IP's but not sending packages. Any help would be wonderful. I use c++.

[Should I buy Leadwerks to prepare for Ultraengine?]

I am just wondering if I should buy Leadwerks to practice the coding and get a feel for the engine or just wait for Ultraengine to release?

[Custom Brushes in Ultra?]

You know the engine gonna be good when it starts with U.