Run setup and Install MS Office 2007 ultimate with any one cd key :

M2QKF-KDQ4R-YHQKD-M4YYK-GPWVD

J67F8-BB7GM-8VPH2-8YMXP-K49QQ

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For Activation:
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 Go to 

C:/Program files/Common Files/microsoft Shared/ Office12 folder

and replace mso.dll with the patched one.(copy and paste the patched MSO.dll file in the above office12 directory to replace the original one)

Now open any office program and chose activation by phone method.

Under activation by phone put 000000 000000 000000 000000 000000 000000 000000 to fill all the boxes and proceed.

its done.

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For genuine validation:
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Now to check OGA validation log on to http://www.microsoft.com/genuine/office/whyvalidate.aspx?displaylang=en

enjoy. validation is successful.