Hardware Requirements for Dell Inspiron 5160 laptop

[bryant]

I see. However, what I was referring to was the fact that I already have a laptop and am really curious if I can simply add the software, an external plextor(what do I really need and for what price?), an internal HD(you say 60gB, but how much and will my 5160 take it?), and is my graphics card compatible(?), and if not will my Dell 5160 take another and at what cost? I do see that the Ruggedized MTU laptop carries a 512mB RAM as my Dell does.
If I can put all these components in as others have done to their laptops, I will go ahead with that, but I do need some very specific advice from experienced laptop users, however.
Bryant