I am very new to linux and have gone with ubuntu 12.04 as my distro. I have been trying to install greedy car thieves and gameplay football which as far as im aware have to be installed manually, i have downloaded both games and unzipped them, made them excutable but when i click on the excutable literally nothing happens, no error message and does not install. Am i missing a step? or have i just been to pampered by windows?!