Windows 7 partition on iMac
I have not yet installed Windows 7 on a Mac, but I would tend to believe that it should install the same as XP or Vista. The Mac OS comes with a utility called Boot Camp, this will allow you to setup a windows partition and install a version of Windows on your Mac, you would then choose the OS at startup you wish to use. If you want to run both OS's at the same time then you will need to purchase a program called Parallels which will run the OSX and multiple other OS's with the OSX environment.
Hope this helps...
Eric