Found this site with an editor and mod, I used the mod and it doesn't crash the game, as i have just started playing the game, I haven't notice if the mod works, but it doesn't affect the game...! Haven't used the editor, but others might and then post results here....!
As this is the only 'mod' I have found for the game, I thought i'd spread the news around!
http://jeffludwig.com/wizardswarriors/download.php