I have a Mk2a. The builder image is what I've been trying to use.

I installed this hardrive myself (as an addition to the original 10GB) the first time around without a problem, so I'd like to think I'm not a complete novice at this.

Mataglap, that looks like I've got to hook up the drive to my computer. I don't have the cables for that right now, but I'll keep it in mind if no one can come up with anything better.