Just extract the files with winrar or 7zip, so, you can install on windows xp and localizate the instalation files in Temp directory, there are the files like a cd instalation, autorun.inf etc., it's so easy.
i extracted 2010 pro plus and created an ISO with autorun.inf it would not install! a screen popped up saying: i am running 7 ultimate 64-bit with office14 32-bit at present. i installed office14 straight from the exe file no problem but when i make an iso of the extracted files with an autorun.inf the above error pops up.