I cant stay with 10.5.4 unfortunately because my graphics card is a GeForce 9500 GT with 512mb ram and I couldn't install "NVIDIA 9000 Series Driver v2" because it would not install unless I had 10.5.5 installed.

If I didn't install that I would not have been able to get my grafix card to work. I wanted it to work so I could use cover flow, play games...ect you know..