a random though, maybe you could do it in your server instead? It seems like you want a simple way rather than a efficent way. I'd recommend trying something like cronjob in linux. Simply make a script in your DB server that query for changes every once and a while, and send some sort of notification(mail?) out when changes detected? I have no idea how complex your script needs to be in order to detect the changes you want, so this might not be the best idea
edit: so basically you want to edit external files with triggers, then maybe UDF is the thing you need.
take a look at this blog and see if that's what you want.