If you have a version of Windows installed on your Mac then you can install a suitable upgrade otherwise you will need a full version of Windows.
No.
It means you have an upgrade version, you should have an older version in order to install the upgrade version.
No Mac OS version can be considered to be in the direct upgrade path, as Mac OS runs only on Macs, and is incompatible with all of the software of Windows 2000.
Yes. Windows version of itunes will recognize the soundfiles in your mac iTunes library.
Unfortunately, no.Warning: When buying windows 7, be sure to buy the "FULL" edition not "Upgrade"
An operating system is the software that runs your machine such as windows / linux / mac. So if you were to upgrade it you are simply upgrading to a newer version
You only choice is limited to virtual machines such as VMWare. And of course you will have to install MAC OS on your virtual machine.
No, you can't. You can probably find a mac version of the same game though or install Windows on your Mac.
Either install Windows on Mac (yes, it can be done), or get the Mac version of Excel (yes, it exists).
If you mean upgrade your system version, then yes. You are able to take one Leopard disk (new version of OS X which is version 10.5) and install it on as many computers as you like. This is not the same for applications though! Some applications such as Adobe's Creative Suite will NOT let you install on multiple computers.
No, sure won't. You need a Mac key for a Mac version and a Windows key for a Windows version. Programming between Mac and Windows is different.
Search on the internet for a program called wine hq it runs windows programs on mac and linux