Since you didn't say which OS im going to assume you mean windows. The way it works is you pop in the cd and the language depends on where you bought the cd, as far as I know at least. When you get to formatting the HDD it's simple , if you have multiple HDDs it will make you choose which one then I'm pretty sure it will ask if you want to use the whole hard drive or just a portion of it. If it doesn't then you have to do advanced installation for that.