Open registry editor by. Start-> Run -> type "regedit" without quotes.
Navigate registry to
HKLM\SYSTEM\CurrentControlSet\Control\Windows
Edit Value of key CSD Version. (to edit double-click on it)
Change value from 200 to 300.
300 stands for XP SP3, 200 stands for XP SP2, 100 stands for XP SP1 .
Restart Your pc
Install MS Office 2010
After installation , revert change to 200 in registry, so system know that it is SP2
