Mac book Air frustration

I am so stuck. I am trying to reinstall the os. I install the dvd sharing program on my dell notebook. Then when I boot up the air pressing the alt button I never ever see my net work. I see other peoples but not mine. But when I boot in to the normal desktop on the air I see my network and it works. So how am i suppose to reinstall my os now?

I tried connecting to another network which is open and the mac book air also found it. I got the reinstall disk image with the arrow, I click the arrow, and hit next on my desk saying waiting for mac book air to connect. The mac air shows a little planet spinning and after 5-10 mins it boots to the normal os.

How am i suppose to reinstall my os now? Please help

I had the same problems bought a drive...sorry icant help.

ok anyone have a better optiong?

You can boot from a USB pen drive on the Macbook Air. Maybe you can create a disk image of the OSX/restore CD and put it on the pen drive and then reinstall OSX from that.

If you don't want ot do that, might I suggest removing any passwords on the router or any special features you may have set on it.