THE STUFF IN " "(QUOTES) IS A LINK OR A COMMAND. DO NOT INCLUDE THEM WHEN USING THEM.
First up, install Ubuntu 9.10 if you have not yet done so. Its really cool OS. Might not be a windows replacer if you are into games and stuff, but if you are here, Ubuntu is for you my friend.Obviously you will need superuser permissions for all most all these tasks.
To install, follow the simple steps given in many places on the net. Just for your convenience, i paste the link below.