>>
>>Why not create your own small update routine instead of using IS? You already have the runtimes installed, just create a small form (exe) that will copy whatever is needed to the correct directories.
>
>Could be a solution, but requires two CD's: one for existing installations, another for new terminals. Not so nice, but works.

I don't see where that is true... you should have one CD that has installshield setup and subsequent cd's for the updates.