It may be worth noting that my "shrink-wrapped" (i.e. retail purchase) copy of Office 2007 does permit use on two computers, so I can have it installed on my desktop and laptop, both from the same "license" and without paying twice. (There are some details as to what two machines the license covers, but in my case using it twice is fully legal.)

That feature isn't clear from the package, but if you're sufficiently A-R to actually read the 30+ page EULA you might (or might not) find something useful in it.

Note that I don't know if an OEM copy (that came installed on your new computer) allows the same "double-use," but most OEM packages include only the "home" version (Works) of "Office-like" programs.

John