How to reinstall network manager for ubuntu with no internet connection?

I installed this program called wicd. Horrible mistake!! It wouldn’t work with my wifi. And now I can’t install network manager, because I can’t connect to the internet because wicd won’t work (nor will removing it). Wired won’t work either. i’ve googled wicd, but every webpage on the net seems to be singing its praise, which means i can’t find how to solve my proglem. Yes, i will remove the stupid program. But tell me, how do I get network manager up and running again?
I am NOT reinstalling my system.

please, i just want my wifi back!!!

p.s. the live CD will connect to the internet, which is how I’m asking this question right now. can i manipulate it to download the package to my linux home directory? (i have 7.10 gusty gibbon installed over my whole hard drive)

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