Hi Steve,

> I thought I did see somewhere a script for incremental save
> but cannot find this, does anyone know where that is?

For this one use IncrementalSave as the command name in the right-side column of the shortcut key.

Also if you would like to have a button on the bottom toolbar for this, there is a UI update here that will do that:
http://moi3d.com/forum/index.php?webtag=MOI&msg=1139.21

- Michael