Create, Edit, Access & Share Microsoft® Office files with the most connected office suite for on iPhone & iPod Touch.

You have to have jailbreaked iPhone with installous installed.

Connect your PC to iphone using WinSCP and following this path:

/private/var/mobile/Documents/Installous/Downloads/

copy the QuickOffice file into installous download folder.

Exit WinSCP, turn on installous on your iPhone tap on downloads tab and install

QuickOffice