Here is a force diplomacy mod, so those that are frustrated by the AI being plain stupid can at least make the AI declare a ceasefire now. You generally need to give them 100 denari first, though. it's a cheat actually
Download link v1.01:
INSTALL:
1: BACK-UP YOUR FILES
2: Extract this file using WinRAR OR WINZIP (freely downloadable from the internet). Then copy the data folder inside here over [RTW Directory]/RTRVII/Data. It should be up and running then. To use it, attempt to make a diplomatic offer, but hit the "?" in the top right corner to run the script (after hitting "show me" on the advisor).
(works fine with your save game)
chears,
Joysong
EDIT:
for people who downloaded this mod:
UPDATE: Created a fix because it's causes a CTD with the new Roman Leadership fix from Muizer.