I am thinking about adding some capacity to my empeg, but already have two drives installed.

The first drive is smaller, so I'd like to replace that one... but how do I do it ???
I guess this is going to be more complicated than just adding a second drive...
(that mission I accomplished thanks to the link I found somewhere on this board - even though I didn' really know what I was doing...)

To make it even more complicated: I'd really like to keep the stuff that's on there right now...

So is this going to be a horror-trip or can even I do that ?