WSE is a program that enhances the Warband engine by adding operations/scripts/triggers and changing hardcoded game mechanics. This is for older Warband versions. If you need WSE for Warband 1.70 or above look here: WSE For Latest Warband patches
WSE fixes some engine bugs, including one that causes very frequent crashes. It also log crash data, so that the ones still present might be reported and fixed easily.
In addition to that, there are some integrated tools that you might find useful, like the memory optimizer.
If you’re hosting a server under Wine you might want to use the Script Enhancer to avoid an engine bug that causes global variable corruption and other issues.
This is an update to the v3.1.5 copy of WSE currently included in Silverstag. It should help folks with newer copies of the game get past the ‘invalid key’ problem.