It is probably bad form to have 2 consecutive posts but here goes.
A separate issue I ran into with Lenovo on the blogs. For those of us that plan on using cloning software to move our HDD partition info to a new SSD and than format the HDD either in an enclosure or in the Ultrabay Caddy.
The target drive for the cloning operation must be in the Lenovo laptop on the original HDD position. (I don't know how this will affect adding a small ssd on the PCIe card).
I replaced my 80 GB original HDD in my T61 this summer with a WD Scorpio Black 320 GB drive. Not wanting to fool with the DVD/CDs created when my Lenovo was new I bought Acronis. Whether I was lucky or actually read this detail earlier I don't know, but my cloning went very well.
Apparently if you try and clone from an internal drive to an external and than swap the drives the laptop won't boot to the new drive once you swap it in. If on the other hand, you move the original HDD out to an enclosure or caddy and than clone from that location in to the new drive in the original drive bay it writes the boot record differently and will work.
Nothing anyone needs to worry about unless adding an SSD and than only if adding it by cloning software.