I thought it would be good to open a thread to solve the question of the Unreal engine driver communication.
The problem: Unreal engine is only accessible through UnrealScript, a proprietary scripting (hence interpreted) language that doesn't allow native C++ code communication - unless you buy a license from Unreal.
Two solutions so far:
1. - Use loopback network communication through a third party sockets library available to use for UnrealScript (slow)
2. - As suggested by botmeister, use local disk I/O access and reading/writing through a temporary file for inter-process communication.
*edit* a summary of the previous discussion can be found in this thread:
http://forums.bots-united.com/showthread.php?t=1299
Discussion: