I'll respond to your question in the other thread here, because it's more appropriate.
The reason you see more than one item in your Grub is because you have two different kernels installed. It's no big deal, but sometimes a kernel update can cause some hardware to stop working, so first thing I'd try is booting with your older kernel.
As far as getting your wireless working, that's kind of a tricky issue that after years of using Linux, I'm still learning myself!
The first thing that I would do is check out
http://linux-wless.passys.nl/ and see what level of compatibility your wireless adapter has and if there is a page for the driver. It usually includes a link to the homepage for each adapter's driver, so you may find some detailed info there on how to set up your particular card.
I've never had the easiest time with Intel wireless chipsets, but I have gotten a couple of them running with minimal tweaking, so try finding some info on your specific card, and go from there. Google is a great place to start if you haven't tried that already. Chances are, if you have a problem, someone else already has too.
Alternatively, you can see if ndiswrapper can utilize a Windows driver for your system, though that is the less-preferred option.
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