As far as I know I don't think you can.
Since Office 2010 is still in Beta, Microsoft has not released a viewer for PowerPoint 2010 yet. However, you should be able to view with the PoserPoint 2007 viewer. See related links for free download.
Download FileFormatConverters from Microsoft. This program will allow you to pen docx files with earlier versions of Microsoft Office.
You sure can! You can also run Microsoft Office files with Openoffice. Microsoft office will run Openoffice files in compatibility mode, with very minor differences if any.
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First you would have to have Microsoft Publisher in order to view or edit .pub files. The program Microsoft Publisher can be opened by going to Start->All Programs->Microsoft Office->Microsoft Publisher.
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XPS
choose the worksheet name on the View Menu
One can view all the web collections of Clip Art in Microsoft Office and insert them from the Clip Organize. But, if you cannot view these web collections, some of office installation files may have been damaged. Just re-run the installation to solve the problem.
The only free versions of Microsoft Word available for download are trial version of Word or Microsoft Office 2010 or 2013 which contains word. Other than this Microsoft Word viewer is available for free but this only lets one view documents in word and not create new ones.
chk Microsoft support for your queries... http://support.Microsoft.com/kb/147424 Microsoft Office Project 2007 Official Website - http://www.Microsoft.com/project/en/us/default.aspx
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