thats very, very simple !!
just hit the Windows-button you have on your keyboard and that should just function as a CMD-button, and otherwise your keyboard is broken with that button, did you allready tried the other side Windows-button? otherwise i think you should just go the store and get yourself a Mac-keyboard,, works much prettier i think, especially when you are used to a laptop/MacBook (especially the really thin Air) you can also hook it up with another Windows keyboard if you like, but when you're used to a Mac keyboard, the buttons alt cmd and control are functioning different, but you can fix that somehow, i will search the web for you to configure that as you it would work normal.
found it.
System Preferences » Keyboard » Keyboard » Modifier Keys
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to answer your secont question in the 2nd paragraph, yes you can, thats an app called winebottler, it will only work for default for normal apps, office 2007 and 2010 use different titlebars then normal, so im not really sure how that will work out, but for normal program you can give this a try...:
http://www.macupdate.com/app/mac/33367/winebottler
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hope i helped you out enough with this !!
regards,
Coengi!!
