Ok, so I bought this software, it is only the CD with a cd holder thing. So is this version an OEM version or what. So if it is or isn't, what does it mean. Like does it limit what I can do, etc... Because my parents already have Microsoft Office Pro 2003 but in a retail box, I was able to load it on a few computers, like 3-5. Will my OEM version only load on one computer once. or what??? Thanks for your time and input.