Try using one of the open source office programmes. Open office is one thats free.
system requirements are
OpenOffice.org 1.1.2 Mac OS X (X11) requires:
Macintosh G4/400 or higher recommended
Mac OS X 10.2 or higher 256 MB of memory for decent performance. 512 MB recommended.
300 MB free hard drive space for OpenOffice.org
600 MB additional hard drive space for installation of auxiliary applications required to run OpenOffice.org.
1 GB additional free space on your System drive for use as swap space during installation and execution.
XFree86/XDarwin or Apple X11, dlcompat, ESP-Ghostscript 7.05, fondu, and libfreetype 6.2+. The Installer will attempt to detect whether you are missing any of these required components, and if necessary will install them for you.
get it from openoffice.org