The licencing conditions you agree to when installing Apple's Mac OS X only allow it to be installed on hardware made by Apple.
yes but it's illegal and very hard
As far as I can tell, you can't run an a920 on a Mac. They don't have the drivers to support it on OS
Your laptop depends on your preferences. If you are on a budget like most people you should go for a Dell or HP laptop. If you want your own personal, home computer get a Mac. Macs can also run Windows and Mac OS x. *wait til Christmas to buy because new operating systems are coming out for both; Snow Leopard and Windows 7
It is illegal to run Mac OS X on anything but Apple computers.
You can't. You need a Mac.
Mac OS X is an operating system released by Apple Inc. It is designed for Apple branded computers, which is why you will never see a Dell, or an HP computer run Mac OS X. There are only two important versions of Mac OS X, Mac OS X Server, and regular Mac OS X. Mac OS X server was designed for servers, while regular Mac OS X was designed for most computers. The current version of Mac OS X (10.6) is named Snow Leopard.
Microsoft Office 2008 for Mac is created by Microsoft for Apple's Mac computers and it requires Mac OS X to work. A Dell is not an Apple Mac and is not running Mac OS X and so Office 2008 for Mac will not work.
Apple's Mac OS X 10.6 (Snow Leopard) can be installed on an Intel laptop if the laptop is made by Apple.
No, Microsoft ActiveX controls cannot run on Mac OS X.
Unless the disc is damaged and so needs reformatting you can run the Mac OS installer over an existing Mac OS.
No. The Dell is an IBM clone and uses a totally different chip than Mac's. You can however use an emulation program. An emulation program allows you to run software from one type of computer on another one.
It is possible to run Mac OS X on a server but it is not legally as the current license tern of Mac OS X server is installing and running on Apple hardware.