Adding External Hard Drives as Internal Drives in Alienware Desktop

Hey guys,

I've got a couple of questions. I'm getting an Alienware desktop soon, and am wondering about a few things. Please reply only if you have or had an Alienware desktop.

1) I'm thinking of getting a single HDD at least at first, and then getting a Solid State Drive later on. How can I then transfer my Windows installation onto the new drive?

2) In order to save money, as I said, I'm just going for the one hard drive. I currently have three external USB 2.0 2TB Hard Drives, one Seagate and two Iomega. Can I put them in as internal drives? Is removing them from their cases all I need do?

Thanks,

RikuoAmero