Help...My MacBook won't restart after the snow leopard 10.6.6 update

Hi Guys,
Really need some help, I have just updated from OSX 10.6.5 to 10.6.6 and upon restarting I am now presented with a MacBook that won't stop beeping and is stuck on a grey screen.
Has this happened to anyone else and what's your suggestions to fix it. I can't find a solution. Any help appreciated.
Thanks

I don't understand the question. Reveal if you have any of those mentioned, then peruse:
http://www.macmaps.com/upgradefaq.html
http://www.macmaps.com/backup.html
http://www.thexlab.com/faqs/installswupdates.html
http://www.thexlab.com/faqs/backuprecovery.html

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