A mod for MB has been adapted to work for MB and WB called TweakMB. It allows you to change quite alot in WB with things like moral, party size, prisoner size, prisoner escape percentages, enginer effects on buildings and the prices/time take to build, tornament betting and renown gain etc.
Direct download link from my download page is http://www.mbrepository.com/download.php?id=1751&f=TweakMB.zip . Failing that youll have to search for it on the forums if you want the mod thread page.