I'd like to share my experience with other Linux newbies with similar problems to my own - finally
I noticed GRUB threads.
I"m most grateful for advice I received on this forum but, regretfully, it didn't work.
So, out of sheer desperation I put this evening my installation SuSe10 CD in CDD - firm in my resolution to fix the problem, even if it meant reinstalling the whole system (and it wouldn't be for the first time, believe me). To my utter amazement I found out that very soon I was offered possibilities of installing new system, or repairing the existing one! Just like in XP!
Naturally I chose "repair" and was immediately offered "automatic repair" "specific repair" and "expert repair" options. Characteristically for a newbie, I chose "expert" - what else? There were quite a few tools to repair almost everything!
Reinstalling the GRUB went off like a breeze and I'm right now writing this from my SuSe. I'm very glad that guys in Novell obviously thought of everything - and I have to admit I'm impressed.
I just hope (probably in vain) that old hands in Linux wan't laugh - but for me it was almost a revelation. And I learned something more, again. So, my fellow newbies, review first your "inner resources" before going to forums for advice - and that's experience talking now!