Install the following in order:
Use the EB Trivial Script (listed as "Configuration" under the Europa Barbarorum start menu group) and choose EB Online Multi Player from the game type drop-down menu. Ensure that you have selected Rome: Total War as the engine and checked the box for Steam Install. You can now click Play EB and enjoy!
As a 32-bit executable, the
Rome: Total War application can only use 2GB of RAM. As a
workaround for our modern 64-bit systems, you can use the 4GB Patch
software to patch the executable, allowing it to use up to 4GB of RAM.
Be careful to point the patcher to
RomeTW.exe. It will
automatically create a backup of the original executable in case you
wish to revert the changes.