Worked for Acer Aspire 5720Z, although I'm not sure if steps 7 and 8 are necessary because I had skipped step 6 the first time, so maybe you should make a note that this step is obligatory also in the case of using graphical ndisgtk. But, as suggested here: http://quilombo.wordpress.com/2008/01/09/atheros-ar5006eg-in-ubuntu-710-..., I have used net5416 driver version.