OpenSUSE Install :: Adding A New Physical HD?

I've opensuse 11.2 installed and running. I have separate mount points for /, home, srv. I have two physical HDs of total 160gb in my system. Now my / partition is nearly full 91-93%. I'm thinking of adding another HD. I cannot figure out how to transfer data after installing the new drive. I plan to move /srv and /home from the main physical disk to the new disk and then add the space freed from under /srv and /home to the / partition. I understand the procedure how to add the drive, how to partition it and so on. I need some help in understanding how to shift the data from one physical drive to the other without losing any simlinks and data of course. I have a virtual host web server running on my machine, so you can understand how difficult it would be if I'd need to do all the linking manually again or worst case if I'd lose any data.