If there is a system 6 version of hypercard you could probably write a small utility to do what you want. Finding utils that work in system 6 is getting hard, do a google search using the groups option (newsgroups) and see if anything comes up.

I think what equill was getting at is very few people want to run around looking for some obscure or non existant utility to save somebody $4 on a new PRAM battery. People will allways mention the cheapest and easiest way to fix something, if you want to make life hard on yourself you are generally on your own.