This most likely will work under windows xp x64 edition due to the fact that since it is created and compiled under windows 7 which is usually the x64 release.....its due to the 64 bit code that it will not function under normal xp.
IF i can return to modding I might see if I can help you out with this SWEG...that or just integrate it into the custom bully .ide I have been working on....ide = lua editor just as a fyi.....