See my OP in this thread, I think it is.
You just need to offload the large video files from drive C: then clone it to a smaller partition on the new drive.
I believe I made an 80 GB partition for the system partition and then created another partition, which was the rest of the drive (several terabytes), used for the recordings (labeled it X:).
Even if you just make an exact clone of the system partitions, you can later shrink the partition using this method. Of course you would have to move/delete the large video files from that partition first so that the smaller partition would still be able to hold all the remaining system (C:) files. You want to leave some free space on the C: partition as well so that swap, temporary files, etc. can be used. Like I said I used an 80 GB partition and the OS took up around 40 GB, so about 40 GB was left free.
In any case, I would move/delete the video files from the original drive before cloning it, the clone should go much faster if it does not have to copy all those large files to the new drive.