I use ISX 3.54 with MSI 2.0 and when the selection "Delay msi engine reboot" is set to true, the reboot dialog never appears!

This causes fatal error when e.g. W2K machine has an old MSI engine and the reboot is not completed --> the shortcuts for MS Office and my application stop working until user is clever enough to reboot. (Sometimes users really dont reboot and spend a lot of time investigating this. )
This reboot dialog not appearing was tested with W2000 and W98, two different projects, one of them I created from scratch.
Any ideas to fix, except have custom action that reboots always? Would it be better to keep using old MSI 1.2(?) or even older 1.1. to avoid reboot requirement of MSI upgrade?
Or how to make own custom action that reboots if MSI was updated?
Tomppa