Wifi has even the most savy of us scratching our heads, and sometimes even kicking the couch...or whatever has the misfortune to cross our paths during this traumatic time. Let me refer you to the pclinuxos wiki. While it is for PCLinuxOS, there are instructions there and links that pertain to your problem.
The screensaver thing, others with more knowledge of that will have to help.
If you look via yast, there should be instructions there for building an app from source. I believe the wiki page I gave you above has a referred link to that as well.
Look, stick with Linux. I know it has it's challenges but concerning Windows...Something wicked this way comes. You might want to take a look at
http://blog.lobby4linux.com/index.php?/arc...of-Attacks.html