Thank you for all your answers...there's some good in each of them...and yeah finally i went back to tiger since i didn't have the leopard installations disks...i backed up all my data on an ext hard drive reinstalled tiger and it's better than ever!!
Even though i extended the ram to 1 gig it...
I have a powerbook G4 and a friend of mine installed leopard on it over a year ago but i'm having problems now and i want to go back to tiger but when i put the install cd on the computer it tells me that i can't put this program on this computer.