Does anyone have a copy of Tung's persist.js script?
It was used to store variables and define events for maps
It's still around here somewhere, but Radnen at one point wrote a replacement for it (100% compatible) which is less buggy, analogue.js:
Actually now that I think of it, minisphere includes analogue.js out of the box. Just do RequireSystemScript('analogue.js'); at the top of your main script and you're good to go.