Super Bull
Remeber when in Os 9.x some app doesn't run or crashes? tipical solution was delet the damned preference file of that App, and finally this app works again.....

My question is..... in OsX 10.x.x can I delete the preference files like in Os 9.x?

I need to put away the classic preferences (System/Library/Preferences/...)
I think is corrupted... (Os x not recognize my Os 9.1 to start up classic, but this Os 9.1 works, the start up control panel let me select it, and boot fine)

Any idea???