install debian 6.0 squeeze

My hardware configuration:
1.HD radeon 4600 ATI
2.AMD's 32 bit cpu
3.AMD MainBoard

For install debian 6.0 testing which named squeeze,follow this:

For ATI video card(hd 4600 radeon):
1.apt-get install xserver-xorg-video-radeon
2.apt-get install firmware-linux-nonfree

For GTK theme:
1.apt-get install gtk2-engines-murrine
2.apt-get install gtk-theme-switch
and then chose the Murrinachrome theme.