Next time you upgrade, you can do it then. AND, if you really want to run any favorite Windows programs (I really don’t know why anyone would though...), you can also run them on the Macintosh, right inside the Mac OS 10.5 operating system. You can barely tell the Windows program is running any differently than the Mac programs (although it is running under the Windows operating system, at the same time the Mac programs are running, side-by-side, under the Mac OS)....
That’s one good reason — at least, I would say so — for Windows users to get a Mac — since they can run *all* the programs on the market if they want to... LOL...