It sounds like Office 2008 should work on your machine. Note that you need
1.5GB of free space on your hard drive to install the software. Also, since
the software comes on a DVD, it would be best to have a machine with a DVD
drive; if you don't have one, it may be possible to access the DVD with
another machine, but that would be more difficult. You should double-check
the system requirements for yourself before making the purchase:
<
http://www.microsoft.com/mac/products/Office2008/system-requirements.mspx>
If you bought Office 2004 on or after Sep. 25, 2007 and reside in the U.S.
or Canada, you can get a free copy of Office 2008:
<
http://www.microsoft.com/mac/go/promotions/default.mspx>
Otherwise, if you purchased a version of Office 2004 previously, you can buy
a new "upgrade" version (or the "Home & Student Edition" if you are
eligible) at a reduced cost. You can then install Office 2008 following the
included instructions; it's not too difficult. It should prompt you to
remove Office 2004 during the installation; otherwise, you can remove it
beforehand by running the "Remove Office" tool located in
/Applications/Microsoft Office 2004/Additional Tools/Remove Office/