Ok. First, thank you for all your help. After much research, I found a solution. I had to go to Restore Console and copy 5 hives from c:\windows\repair to c:\windows\system32\config. The only problem is that some programs didn't work. Luckuly, I had a ghost image from last month (that I didn't want to use as a primirary solution) but I was able to extract from the ghost image, (with Ghost 2003 browser) the "software" hive from c:\windows\system32\config. After restoring this hive, everything was back to normal!!!
Thanks again.