need some basic questions answered

[jessinator]

ok so i have an old computer that i inherited from my grandma and i installed knoppix on it because it was the only distro that worked. now i am running into some problems. 1. it won't save my screen resolution 2. i want to install xfce. I have installed it through synaptic package manager, and i am told that you start using it through an option in the user login menu. however, when I log out knoppix just logs me back in (with the wrong screen resolution! grr) 3. as I am typing this iceweasel thinks every word is misspelled. 4. what is the point of iceweasel vs firefox anyway? thanks

[Denver Dave]

Chrome seems to be the default browser on Knoppix 6.7. Any idea on how to install Firefox?