Can you clarify a few points...
Originally, when it was working the way you want, what Mac OS version was starting up? That ended up at a fully functional Desktop?
When you made your first post (after you had a problem), how was it starting up?
When you made your last post, where it "starts up as Mac OS 9.2," is that different from how it started up when you made your first post, the "gray bubble screen with no icons"?
What model Mac is it? Is it an old iMac, an old PowerBook, an old Power Mac? G3, G4?
Do you have a Mac OS installation disc of any kind, that can start up the Mac from the optical drive?
You have another Mac that is Intel-based, more recent, correct?