I recently discovered, that closing SheepShaver's(Windows XP, Mac OS 9.0.4) window, creates this window inside emulator:
http://img833.imageshack.us/img833/9685/20110430175901.png
It's similar that this one on my MacBook Pro with Snow Leopard and iBook G4 with Tiger when I use power button. When I click power button in my iMac G4 15' 800MHz both in Mac OS 9.2.2 and Jaguar, it just goes sleep. I think that this window appears only on portable Macs, but is there an ability to have it also on stationary Mac with Mac OS 9?

So, if it works on every Mac computer, is there a tweak, AppleScript or something similar that shows this window after pressing the power button(not on keyboard but on computer) instead of going sleep?